Venezuela related activities Effective as of the end of the fourth quarter of 2015, we deconsolidated our Venezuelan subsidiaries and began accounting for the investments in our Venezuelan subsidiaries using the cost method of accounting effective in the first quarter of 2016.
The conditions within Venezuela driving this decision remained in place during 2016 and 2017.
Prior to deconsolidation, we remeasured our Venezuelan bolivar operations within our Water, Paper, Food & Beverage, Institutional and the bolivar portion of our Venezuelan operations within Energy operating segments from the official exchange rate at the time of 6.3 bolivares to 1 U. S.  dollar to the SIMADI rate at the time of approximately 200 bolivares to 1 U. S.  dollar.
As a result of the ownership structure of our Food & Beverage and Institutional operations in Venezuela, we reflected a portion of the devaluation impact as a component of net income (loss) attributable to noncontrolling interest on the Consolidated Statement of Income.
Upon deconsolidation, we recorded a charge to fully write off our intercompany receivables and investment.
The total charges during 2015 related to our actions in Venezuela were $289.3 million ($246.8 million after tax).
We reflected $11.1 million of the above charges as a component of net income (loss) attributable to noncontrolling interest on the Consolidated Statement of Income, resulting in a net charge of $235.7 million or $0.78 per diluted share.
We recorded gains due to U. S.  dollar cash recoveries of intercompany receivables written off at the time of deconsolidation of $11.5 million ($7.2 million after tax) or $0.02 per diluted share and $7.8 million ($4.9 million after tax) or $0.02 per diluted share in 2017 and 2016, respectively.
Gain on sale of business During 2017, we disposed of the Equipment Care business and recorded a gain of $46.1 million ($12.4 million after tax primarily due to non-deductible goodwill), or $0.04 per diluted share, net of working capital adjustments, costs to sell and other transaction expenses.
The gain has been included as a component of special (gains) and charges on the Consolidated Statement of Income.
Other We recorded net gains of $1.4 million ($0.7 million after tax), or less than $0.01 per diluted share, net charges of $33.2 million ($21.1 million after tax) or $0.07 per diluted share, and net charges of $56.3 million ($34.5 million after tax), or $0.11 per diluted share in 2017, 2016, and 2015, respectively, primarily related to litigation related charges and settlements.
In 2015, this also included the recognition of a loss on the sale of a portion of our Ecovation business, offset partially by the recovery of funds deposited into escrow as part of the Champion transaction.
These items have been included as a component of special (gains) and charges on the Consolidated Statement of Income.
Interest Expense, net During 2017, in anticipation of U. S.  tax reform and a potential limit on interest deductibility in future years, we entered into transactions to exchange or retire certain long-term debt, and incurred debt exchange and extinguishment charges of $21.9 million ($13.6 million after tax), or $0.05 per diluted share.
This charge has been included as a component of interest expense, net on the Consolidated Statement of Income.
Operating Income and Operating Income Margin
## Table 0 ##
Our operating income and corresponding operating income margin are shown in the previous tables.
Operating income margin is defined as operating income divided by sales.
Other Acquisitions The components of the cash paid for other acquisitions, excluding the Anios transaction, for the current and prior year transactions during 2017, 2016 and 2015, are shown in the following table.
## Table 1 ##
The 2017 and 2016 acquisition related liabilities are related primarily to payments of settled liabilities from previous transactions.
The 2015 acquisition related liability is related to holdback liabilities and contingent consideration as part of the Jianghai, Swisher, and UltraFab acquisitions.
The weighted average useful lives of identifiable intangible assets acquired, excluding the Anios transaction, was 12, 4, and 10 years as of December 31, 2017, 2016 and 2015, respectively.2017 Activity In January 2017, the Company acquired a business which provides water solutions to automotive customers.
The acquired business became part of the Company’s Global Industrial reportable segment.
In September 2017, the Company acquired a paper chemicals business which became a part of the Company’s Global Industrial reportable segment.
In December 2017, the Company acquired U. S.  based pest elimination businesses that provide specialized capabilities in food storage.
These businesses became part of the Company’s Other reportable segment.
Additional acquisitions were made during the year which became part of the Company’s Global Energy and Global Industrial reportable segments.
Annualized pre-acquisition sales of the businesses acquired were approximately $135 million.2016 Activity In July 2016, the Company made an equity method investment in a global leader in the design and engineering of complex and comprehensive water treatment solutions that improve water quality and reduce net water usage which became part of the Company’s Global Industrial reportable segment.
Also during 2016, the Company acquired certain assets of an oilfield chemical distributor which became part of the Company’s Global Energy reportable segment.2015 Activity In June 2015, the Company acquired an industrial water treatment business, which became part of the Company’s Global Industrial reportable segment.
In November 2015, the Company acquired a U. S.  based hygiene and sanitizing solutions business in the foodservice, hospitality, retail and healthcare markets.
The acquired business became part of the Company’s Global Institutional reportable segment.
The Company also acquired, in November 2015, a business which manufactures customized solutions and specialized chemical injection systems for the oil and gas industry.
The acquired business became part of the Company’s Global Energy reportable segment.
Additional acquisitions were made during the year which became part of the Company’s Global Institutional, Other and Global Industrial reportable segments.
Annualized pre-acquisition sales of the businesses acquired were approximately $300 million.
In 2017, the Company obtained tax benefits from tax holidays in two foreign jurisdictions, the Dominican Republic and Singapore.
The Company received a permit of operation, which expires in July 2021, from the National Council of Free Zones of Exportation for the Dominican Republic.
Companies operating under the Free Zones are not subject to income tax in the Dominican Republic on export income.
The Company has two tax incentives awarded by the Singapore Economic Development Board.
These incentives provide for a preferential 10% tax rate on certain headquarter income and a 0% tax rate on manufacturing profits generated at the Company’s facility located on Jurong Island.
In 2016 and 2015 one of the Company’s legal entities in China was entitled to the benefit of incentives provided by the Chinese government to technology companies in order to encourage development of the high-tech industry, including reduced tax rates and other measures.
As a result, the Company was entitled to a preferential enterprise income tax rate of 15%.
The Company did not recognize a benefit related to this China tax incentive in 2017.
The tax reduction as the result of the tax holidays for 2017 was $16.9 million and 2016 was $6.4 million.
The impact of the tax holiday in 2015 was similar to 2016.
A reconciliation of the statutory U. S.  federal income tax rate to the Company’s effective income tax rate is as follows:
## Table 2 ##
Prior to enactment of the Tax Act, the Company did not recognize a deferred tax liability related to unremitted foreign earnings because it overcame the presumption of the repatriation of foreign earnings.
Upon enactment, the Tax Act imposes a tax on certain foreign earnings and profits at various tax rates.
The Company recorded a provisional amount for the income tax effects related to the one-time transition tax of $160.1 million which is subject to payment over eight years.
The one-time transition tax is based on certain foreign earnings and profits for which earnings had been previously indefinitely reinvested, as well as estimates of assets and liabilities at future dates.
The transition tax is based in part on the amount of those earnings held in cash and other specified assets, and is subject to change when the calculation of foreign earnings and profits is finalized, and the amount of specific assets and liabilities held at a future date is known.
No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax and any additional outside basis differences inherent in these entities as these amounts continue to be indefinitely reinvested in foreign operations.
The Company’s provisional amount is based on an estimate of the one-time transition tax, and subject to finalization of estimates of assets and liabilities at future dates, the calculation of deemed repatriation of foreign income and the state tax effect of adjustments made to federal temporary differences.
In addition, federal and state tax authorities continue to issue technical guidance which may differ from our initial interpretations.
The provisional amount is subject to adjustment during the measurement period of up to one year following the December 2017 enactment of the Tax Act.
The Company continues to assert permanent reinvestment of the undistributed earnings of international affiliates, and, if there are policy changes, the Company would record the applicable taxes.
The Company’s estimates are subject to continued technical guidance which may change the provisional amounts recorded in the financial statements, and will be evaluated throughout the measurement period, as permitted by SAB 118.
As of December 31, 2015, the Company had deferred tax liabilities of $25.8 million on foreign earnings of the legacy Nalco entities and legacy Champion entities that the Company intended to repatriate.
The deferred tax liabilities originated based on purchase accounting decisions made in connection with the Nalco merger and Champion acquisition and were the result of extensive studies required to calculate the impact at the purchase date.
The remaining foreign earnings were repatriated in 2016, thus reducing the deferred tax liabilities to zero as of December 31, 2016.
The Company files U. S.  federal income tax returns and income tax returns in various U. S.  state and non- U. S.  jurisdictions.
With few exceptions, the Company is no longer subject to state and foreign income tax examinations by tax authorities for years before 2014.
The IRS has completed examinations of the Company’s U. S.  federal income tax returns (Ecolab and Nalco) through 2014.
The Company’s U. S.  federal income tax return for the years 2015 and 2016 are currently under audit.
In addition to the U. S.  federal examination, there is ongoing audit activity in several U. S.  state and foreign jurisdictions.
The Company anticipates changes to its uncertain tax positions due to closing of various audit years mentioned above.
The Company does not believe these changes will result in a material impact during the next twelve months.
Decreases in the Company’s gross liability could result in offsets to other balance sheet accounts, cash payments, and/or adjustments to tax expense.
The occurrence of these events and/or other events not included above within the next twelve months could change depending on a variety of factors and result in amounts different from above.

<table><tr><td></td><td></td><td></td><td></td><td colspan="2">Percent Change</td></tr><tr><td>(millions)</td><td>2017</td><td>2016</td><td>2015</td><td>2017</td><td>2016</td></tr><tr><td>Reported GAAP operating income</td><td>$2,019.8</td><td>$1,915.0</td><td>$1,561.3</td><td>5%</td><td>23%</td></tr><tr><td>Special (gains) and charges</td><td>40.3</td><td>105.5</td><td>495.4</td><td></td><td></td></tr><tr><td>Non-GAAP adjusted operating income</td><td>2,060.1</td><td>2,020.5</td><td>2,056.7</td><td>2</td><td>-2</td></tr><tr><td>Effect of foreign currency translation</td><td>-32.9</td><td>-25.2</td><td>-119.8</td><td></td><td></td></tr><tr><td>Non-GAAP adjusted fixed currency operating income</td><td>$2,027.2</td><td>$1,995.3</td><td>$1,936.9</td><td>2%</td><td>3%</td></tr><tr><td>(percent)</td><td>2017</td><td>2016</td><td>2015</td><td></td><td></td></tr><tr><td>Reported GAAP operating income margin</td><td>14.6%</td><td>14.6%</td><td>11.5%</td><td></td><td></td></tr><tr><td>Non-GAAP adjusted operating income margin</td><td>14.9%</td><td>15.4%</td><td>15.2%</td><td></td><td></td></tr><tr><td>Non-GAAP adjusted fixed currency</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>operating income margin</td><td>14.9%</td><td>15.3%</td><td>14.9%</td><td></td><td></td></tr></table>
<table><tr><td>(millions)</td><td>2017</td><td>2016</td><td>2015</td></tr><tr><td>Net tangible assets acquired and equity method investments</td><td>$29.8</td><td>$46.9</td><td>$103.7</td></tr><tr><td>Identifiable intangible assets</td><td></td><td></td><td></td></tr><tr><td>Customer relationships</td><td>67.0</td><td>2.6</td><td>65.6</td></tr><tr><td>Patents</td><td>-</td><td>-</td><td>6.7</td></tr><tr><td>Trademarks</td><td>2.5</td><td>-</td><td>13.5</td></tr><tr><td>Non-compete agreements</td><td>0.2</td><td>-</td><td>4.2</td></tr><tr><td>Other technology</td><td>7.6</td><td>1.1</td><td>8.7</td></tr><tr><td>Total intangible assets</td><td>77.3</td><td>3.7</td><td>98.7</td></tr><tr><td>Goodwill</td><td>87.4</td><td>7.3</td><td>136.9</td></tr><tr><td>Total aggregate purchase price</td><td>194.5</td><td>57.9</td><td>339.3</td></tr><tr><td>Acquisition related liabilities and contingent consideration</td><td>5.6</td><td>27.1</td><td>-60.5</td></tr><tr><td>Net cash paid for acquisitions, including acquisition related</td><td></td><td></td><td></td></tr><tr><td>liabilities and contingent consideration</td><td>$200.1</td><td>$85.0</td><td>$278.8</td></tr></table>
<table><tr><td></td><td>2017</td><td>2016</td><td>2015</td></tr><tr><td>Statutory U.S. rate</td><td>35.0%</td><td>35.0%</td><td>35.0%</td></tr><tr><td>One time transition tax</td><td>9.1</td><td>-</td><td>-</td></tr><tr><td>State income taxes, net of federal benefit</td><td>0.4</td><td>0.9</td><td>0.4</td></tr><tr><td>Foreign operations</td><td>-7.4</td><td>-8.0</td><td>-8.1</td></tr><tr><td>Domestic manufacturing deduction</td><td>-2.2</td><td>-2.0</td><td>-2.7</td></tr><tr><td>R&D credit</td><td>-1.0</td><td>-1.1</td><td>-1.0</td></tr><tr><td>Change in valuation allowance</td><td>0.2</td><td>-0.7</td><td>-1.7</td></tr><tr><td>Audit settlements and refunds</td><td>-0.1</td><td>-0.2</td><td>-0.7</td></tr><tr><td>Excess stock benefits</td><td>-2.3</td><td>-</td><td>-</td></tr><tr><td>Change in federal tax rate (deferred taxes)</td><td>-18.2</td><td>-</td><td>-</td></tr><tr><td>Venezuela charges</td><td>-</td><td>-</td><td>4.5</td></tr><tr><td>Worthless stock deduction</td><td>-</td><td>0.4</td><td>-3.0</td></tr><tr><td>Other, net</td><td>0.2</td><td>0.1</td><td>0.1</td></tr><tr><td>Effective income tax rate</td><td>13.7%</td><td>24.4%</td><td>22.8%</td></tr></table>

Question: What is the proportion of Non-GAAP adjusted fixed currency operating income to the total in 2017 ?