which resulted in charges for inventory write-downs, property and equipment impairments, employee termination benefits, intangible asset impairments and facility closure costs.  ?
We ended fiscal 2011 with $1.1 billion of cash and cash equivalents, compared to $1.8 billion at the end of fiscal 2010.
Operating cash flow decreased to $1.2 billion in fiscal 2011 compared to fiscal 2010 operating cash flow of $2.2 billion due primarily to changes in working capital, while capital expenditures increased 21.0% to $744 million.  ?
During fiscal 2011, we made four dividend payments totaling $0.58 per share, or $237 million in the aggregate.  ?
We repurchased and retired 32.6 million shares at a cost of $1.2 billion during fiscal 2011.
Consolidated Results The following table presents selected consolidated financial data for each of the past three fiscal years ($ in millions, except per share amounts):
## Table 0 ##
(1) Included within our operating income and net earnings for fiscal 2011 is $222 million ($147 million net of taxes) of restructuring charges recorded in the fiscal fourth quarter related to measures we took to restructure our businesses.
These charges resulted in a decrease in our operating income of 0.5% of revenue for the fiscal year.
(2) Included within our operating income and net earnings for fiscal 2010 is $52 million ($25 million net of taxes and noncontrolling interest) of restructuring charges recorded in the fiscal first quarter related to measures we took to restructure our businesses.
These charges resulted in a decrease in our operating income of 0.1% of revenue for the fiscal year.
(3) Included within our operating income and net earnings for fiscal 2009 is $78 million ($48 million net of tax) of restructuring charges recorded in the fiscal fourth quarter related to measures we took to restructure our businesses.
In addition, operating income is inclusive of goodwill and tradename impairment charges of $66 million ($64 net of tax) related to our former Speakeasy business.
Collectively, these charges resulted in a decrease in our operating income of 0.2% of revenue for the fiscal year.
(4) Included within our net earnings for fiscal 2009 is $111 million ($96 million net of tax) of investment impairment charges related to our investment in the common stock of CPW.
(5) Because retailers vary in how they record costs of operating their supply chain between cost of goods sold and SG&A, our gross profit rate and SG&A rate may not be comparable to other retailers’ corresponding rates.
For additional information regarding costs classified in cost of goods sold and SG&A, refer to Note 1, Summary of Significant Accounting Policies, of the Notes to Consolidated Financial Statements, included in Item 8, Financial Statements and Supplementary Data, of this Annual Report on Form 10-K.  Fiscal 2011 Results Compared With Fiscal 2010 Throughout fiscal 2011, the majority of geographic markets in which we operate generally continued to endure difficult and uncertain economic conditions.
In addition, customer appetite for certain product categories was below industry expectations.
Both of these factors had a direct bearing on our revenue.
We have responded to the current economic environment by closely managing our SG&A, as well as focusing on efforts to improve our gross profit.
The 1.2% revenue increase in fiscal 2011 resulted primarily from the net addition of 147 new stores during fiscal 2011 and the positive impact of foreign currency exchange rate fluctuations, partially offset by a comparable store sales decline.
The following table presents the Domestic segment’s revenue mix percentages and comparable store sales percentage changes by revenue category in fiscal 2010 and 2009:
## Table 1 ##
Our Domestic segment’s comparable store sales gain in fiscal 2010 improved sequentially each quarter of the fiscal year due primarily to an increase in average ticket and reflected our market share gains.
The products having the largest effect on our Domestic segment’s comparable store sales gain in fiscal 2010 were notebook computers, flat-panel televisions and mobile phones.
Stronger sales in these product categories were partially offset by comparable store sales declines in our entertainment revenue category.
Revenue from our Domestic segment’s online operations increased 22% in fiscal 2010 and is incorporated in the table above.
The 1.1% comparable store sales gain in the consumer electronics revenue category was driven primarily by increases in the sales of flat-panel televisions as unit sales increases more than offset average selling price decreases, partially offset by declines in the sales of navigation products and MP3 players.
The 12.8% comparable store sales gain in the home office revenue category was primarily the result of continued growth in the sales of notebook computers, which benefited from the launch of a new operating system, as well as mobile phones, which included a full year of our Best Buy Mobile storewithin-a-store experience in all U. S.  Best Buy stores, partially offset by declines in the sales of computer monitors.
The 13.2% comparable store sales decline in the entertainment revenue category was due principally to a decline in sales of video gaming, partially caused by industry-wide softness and a maturing product platform, as well as a continued decline in sales of DVDs and CDs.
The 4.2% comparable store sales decline in the appliances revenue category was due to a decrease in unit sales which more than offset increases in average selling prices.
The 1.1% comparable store sales decline in the services revenue category was due primarily to a decline in home theater installation, partially offset by modest increases in our sales of extended warranties.
Our Domestic segment experienced gross profit growth of $407 million in fiscal 2010, or 4.7% compared to fiscal 2009, due to increased revenue volumes.
The 0.4% of revenue decrease in the gross profit rate was due primarily to a change in revenue mix, which reduced the gross profit rate by 0.5% of revenue and resulted from a continued shift in the revenue mix to sales of lower-margin notebook computers, partially offset by additional mix shift into higher-margin mobile phones.
In addition, improved margin rate performance provided a 0.1% of revenue increase to the gross profit rate.
Despite revenue growth of 6.4%, our Domestic segment’s SG&A grew only 3.1% or by $207 million.
Continued store openings and significant year over year performance improvements drove higher SG&A spend in fiscal 2010 for incentive pay, payroll and benefits and rent, partially offset by lower SG&A spend in various discretionary categories such as information technology and supply chain project expenditures, store reset and transformation costs, advertising and travel.
The 0.6% of revenue SG&A rate decline was primarily due to the reductions in discretionary categories discussed above, which collectively reduced the SG&A rate by 1.0% of revenue.
The overall leveraging impact of higher comparable store sales on payroll and benefits further reduced the SG&A rate by 0.2% of revenue.
However, we had higher incentive pay expense due to improvements in performance in fiscal 2010 and no incentive pay expense in the prior year, which collectively offset the SG&A rate improvement by 0.6% of revenue.
The following table reconciles our International segment stores open at the end of each of the last three fiscal years:
## Table 2 ##
(1) Represents The Carphone Warehouse and The Phone House small-format stores.
(2) Represents Best Buy branded large-format stores in the U. K.  (3) On February 21, 2011, we announced plans to exit the Turkey market and restructure the Best Buy branded stores in China during fiscal 2012.
Fiscal 2011 Results Compared With Fiscal 2010 While challenging economic conditions persisted in fiscal 2011 in many of the countries in which we operate, our International segment continued to grow revenue and experienced a comparable store sales gain for the year.
A decline in operating income was due principally to the impact of the restructuring activities in fiscal 2011.
Excluding the impact of foreign currency exchange rate fluctuations, the International segment experienced gross profit improvements with only a modest increase in SG&A.
Continued growth in consumer spending and temporary government stimulus programs contributed to stronger sales and improved operating income in our China operations, particularly in our Five Star business.
Our Canada operations faced many of the same market conditions and factors affecting the U. S.  consumer electronics industry, with the adoption of new technology and the timing of product life-cycles continuing to play an important role in revenue trends.
Similarly, our Europe operations saw the impacts from a constrained economy, but continued to benefit from higher Best Buy Mobile profit share-based management fees paid in fiscal 2011.
The 5.7% increase in revenue for fiscal 2011 was due to the positive impact of foreign currency exchange rate fluctuations (mainly related to the Canadian dollar), the impact of net new stores opened during fiscal 2011, and a 2.4% comparable store sales gain, partially offset by the impact of having one less week of revenue in Europe and a decline in sales in noncomparable sales channels.
The increase in comparable store sales in fiscal 2011 was the result of gains in China and Europe, partially offset by a decline in Canada.
Hologic, Inc.  Notes to Consolidated Financial Statements (continued) (In thousands, except per share data) Fiscal 2007 Acquisition: Acquisition of BioLucent, Inc.  On September 18, 2007 the Company completed the acquisition of BioLucent, Inc.  (“BioLucent”) pursuant to a definitive agreement dated June 20, 2007.
The results of operations for BioLucent have been included in the Company’s consolidated financial statements from the date of acquisition as part of its Mammography/Breast Care business segment.
The Company has concluded that the acquisition of BioLucent does not represent a material business combination and therefore no pro forma financial information has been provided herein.
BioLucent, previously located in Aliso Viejo, California, develops, markets and sells MammoPad breast cushions to decrease the discomfort associated with mammography.
Prior to the acquisition, BioLucent’s primary research and development efforts were directed at its brachytherapy business which was focused on breast cancer therapy.
Prior to the acquisition, BioLucent spun-off its brachytherapy technology and business to the holders of BioLucent’s outstanding shares of capital stock.
As a result, the Company only acquired BioLucent’s MammoPad cushion business and related assets.
The Company invested $1,000 directly in the spun-off brachytherapy business in exchange for shares of preferred stock issued by the new business.
The aggregate purchase price for BioLucent was approximately $73,200, consisting of approximately $6,800 in cash and 2,314 shares of Hologic Common Stock valued at approximately $63,200, debt assumed and paid off of approximately $1,600 and approximately $1,600 for acquisition related fees and expenses.
The Company determined the fair value of the shares issued in connection with the acquisition in accordance with EITF Issue No.99-12, Determination of the Measurement Date for the Market Price of Acquirer Securities Issued in a Purchase Business Combination.
The acquisition also provides for up to two annual earn-out payments not to exceed $15,000 in the aggregate based on BioLucent’s achievement of certain revenue targets.
The Company has considered the provision of EITF Issue No.95-8, Accounting for Contingent Consideration Paid to the Shareholders of an Acquired Enterprise in a Purchase Business Combination, and concluded that this contingent consideration will represent additional purchase price.
As a result, goodwill will be increased by the amount of the additional consideration, if any, when it becomes due and payable.
As of September 27, 2008, the Company has not recorded any amounts for these potential earn-outs.
The allocation of the purchase price is based upon estimates of the fair value of assets acquired and liabilities assumed as of September 18, 2007.
The components and allocation of the purchase price consists of the following approximate amounts:

<table><tr><td> Consolidated Performance Summary </td><td>2011 -1</td><td>2010 -2</td><td>2009 -3(4)</td></tr><tr><td>Revenue</td><td>$50,272</td><td>$49,694</td><td>$45,015</td></tr><tr><td>Revenue gain %</td><td>1.2%</td><td>10.4%</td><td>12.5%</td></tr><tr><td>Comparable store sales % (decline) gain</td><td>-1.8%</td><td>0.6%</td><td>-1.3%</td></tr><tr><td>Gross profit as % of revenue<sup>-5</sup></td><td>25.1%</td><td>24.5%</td><td>24.4%</td></tr><tr><td>SG&A as % of revenue<sup>-5</sup></td><td>20.5%</td><td>19.9%</td><td>20.0%</td></tr><tr><td>Operating income</td><td>$2,114</td><td>$2,235</td><td>$1,870</td></tr><tr><td>Operating income as % of revenue</td><td>4.2%</td><td>4.5%</td><td>4.2%</td></tr><tr><td>Net earnings</td><td>$1,277</td><td>$1,317</td><td>$1,003</td></tr><tr><td>Diluted earnings per share</td><td>$3.08</td><td>$3.10</td><td>$2.39</td></tr></table>
<table><tr><td></td><td colspan="2">Revenue Mix Summary Year Ended</td><td colspan="2">Comparable Store Sales Summary Year Ended</td></tr><tr><td></td><td>February 27, 2010</td><td>February 28, 2009</td><td>February 27, 2010</td><td>February 28, 2009</td></tr><tr><td>Consumer electronics</td><td>39%</td><td>39%</td><td>1.1%</td><td>-5.8%</td></tr><tr><td>Home office</td><td>34%</td><td>31%</td><td>12.8%</td><td>10.4%</td></tr><tr><td>Entertainment</td><td>16%</td><td>19%</td><td>-13.2%</td><td>-5.9%</td></tr><tr><td>Appliances</td><td>4%</td><td>5%</td><td>-4.2%</td><td>-15.4%</td></tr><tr><td>Services</td><td>6%</td><td>6%</td><td>-1.1%</td><td>4.1%</td></tr><tr><td>Other</td><td>1%</td><td><1%</td><td>n/a</td><td>n/a</td></tr><tr><td>Total</td><td>100%</td><td>100%</td><td>1.7%</td><td>-1.3%</td></tr></table>
<table><tr><td> </td><td rowspan="2"> Fiscal 2009  Total Stores at End of Fiscal Year </td><td colspan="3"> Fiscal 2010</td><td colspan="3"> Fiscal 2011</td></tr><tr><td> </td><td> Stores Opened </td><td>Stores Closed</td><td> Total Stores at End of Fiscal Year </td><td> Stores Opened </td><td>Stores Closed</td><td> Total Stores at End of Fiscal Year </td></tr><tr><td>Best Buy Europe — small box<sup>-1</sup></td><td>2,465</td><td>82</td><td>-94</td><td>2,453</td><td>86</td><td>-99</td><td>2,440</td></tr><tr><td>Best Buy Europe — big box<sup>-2</sup></td><td>—</td><td>—</td><td>—</td><td>—</td><td>6</td><td>—</td><td>6</td></tr><tr><td>Canada</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Future Shop</td><td>139</td><td>5</td><td>—</td><td>144</td><td>2</td><td>—</td><td>146</td></tr><tr><td>Best Buy</td><td>58</td><td>6</td><td>—</td><td>64</td><td>7</td><td>—</td><td>71</td></tr><tr><td>Best Buy Mobile</td><td>3</td><td>1</td><td>—</td><td>4</td><td>6</td><td>—</td><td>10</td></tr><tr><td>China</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Five Star</td><td>164</td><td>6</td><td>-12</td><td>158</td><td>12</td><td>-4</td><td>166</td></tr><tr><td>Best Buy<sup>-3</sup></td><td>5</td><td>1</td><td>—</td><td>6</td><td>2</td><td>—</td><td>8</td></tr><tr><td>Mexico</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Best Buy</td><td>1</td><td>4</td><td>—</td><td>5</td><td>1</td><td>—</td><td>6</td></tr><tr><td>Turkey</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Best Buy<sup>-3</sup></td><td>—</td><td>1</td><td>—</td><td>1</td><td>1</td><td>—</td><td>2</td></tr><tr><td>Total International segment stores</td><td>2,835</td><td>106</td><td>-106</td><td>2,835</td><td>123</td><td>-103</td><td>2,855</td></tr></table>

Question: What is the difference between the greatest Stores Opened in 2011 and 2010？
Answer: 4