3m 2019s cash and cash equivalents balance at december 31 , 2007 totaled $ 1.896 billion , with an additional $ 1.059 billion in current and long-term marketable securities .3m 2019s strong balance sheet and liquidity provide the company with significant flexibility to take advantage of numerous opportunities going forward .the company will continue to invest in its operations to drive growth , including continual review of acquisition opportunities .as previously discussed , 3m expects to complete the acquisition of aearo holding corp .for approximately $ 1.2 billion in 2008 .3m paid dividends of $ 1.380 billion in 2007 , and has a long history of dividend increases .in february 2008 , the board of directors increased the quarterly dividend on 3m common stock by 4.2% ( 4.2 % ) to 50 cents per share , equivalent to an annual dividend of $ 2.00 per share .in february 2007 , 3m 2019s board of directors authorized a two-year share repurchase of up to $ 7.0 billion for the period from february 12 , 2007 to february 28 , 2009 .at december 31 , 2007 , the company has $ 4.1 billion remaining under this authorization , which the company does not currently expect to fully utilize by february 28 , 2009 .in 2008 , the company expects to contribute an amount in the range of $ 100 million to $ 400 million to its u.s .and international pension plans .the company does not have a required minimum pension contribution obligation for its u.s .plans in 2008 .therefore , the amount of the anticipated discretionary contribution could vary significantly depending on the u.s.-plans funding status as of the 2008 measurement date and the anticipated tax deductibility of the contribution .future contributions will also depend on market conditions , interest rates and other factors .3m believes its strong cash flow and balance sheet will allow it to fund future pension needs without compromising growth opportunities .the company uses various working capital measures that place emphasis and focus on certain working capital assets and liabilities .these measures are not defined under u.s .generally accepted accounting principles and may not be computed the same as similarly titled measures used by other companies .one of the primary working capital measures 3m uses is a combined index , which includes accounts receivable , inventory and accounts payable .this combined index ( defined as quarterly net sales 2013 fourth quarter at year-end 2013 multiplied by four , divided by ending net accounts receivable plus inventory less accounts payable ) was 5.3 at december 31 , 2007 , down from 5.4 at december 31 , 2006 .receivables increased $ 260 million , or 8.4% ( 8.4 % ) , compared with december 31 , 2006 .currency translation increased accounts receivable by $ 159 million year-on-year , as the u.s .dollar weakened in aggregate against a multitude of currencies .inventories increased $ 251 million , or 9.7% ( 9.7 % ) , compared with december 31 , 2006 .currency translation increased inventories by $ 132 million year-on-year .accounts payable increased $ 103 million compared with december 31 , 2006 , with $ 65 million of this year-on-year increase related to currency translation .cash flows from operating , investing and financing activities are provided in the tables that follow .individual amounts in the consolidated statement of cash flows exclude the effects of acquisitions , divestitures and exchange rate impacts , which are presented separately in the cash flows .thus , the amounts presented in the following operating , investing and financing activities tables reflect changes in balances from period to period adjusted for these effects .cash flows from operating activities : years ended december 31 .
[['( millions )', '2007', '2006', '2005'], ['net income', '$ 4096', '$ 3851', '$ 3111'], ['depreciation and amortization', '1072', '1079', '986'], ['company pension contributions', '-376 ( 376 )', '-348 ( 348 )', '-654 ( 654 )'], ['company postretirement contributions', '-3 ( 3 )', '-37 ( 37 )', '-134 ( 134 )'], ['company pension expense', '190', '347', '331'], ['company postretirement expense', '65', '93', '106'], ['stock-based compensation expense', '228', '200', '155'], ['gain from sale of businesses', '-849 ( 849 )', '-1074 ( 1074 )', '2014'], ['income taxes ( deferred and accrued income taxes )', '-34 ( 34 )', '-178 ( 178 )', '402'], ['excess tax benefits from stock-based compensation', '-74 ( 74 )', '-60 ( 60 )', '-54 ( 54 )'], ['accounts receivable', '-35 ( 35 )', '-103 ( 103 )', '-184 ( 184 )'], ['inventories', '-54 ( 54 )', '-309 ( 309 )', '-294 ( 294 )'], ['accounts payable', '-4 ( 4 )', '68', '113'], ['product and other insurance receivables and claims', '158', '58', '122'], ['other 2014 net', '-105 ( 105 )', '252', '198'], ['net cash provided by operating activities', '$ 4275', '$ 3839', '$ 4204']]
.

Question: what was the percentage change in the net income
Answer: 6.4%