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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Foreign Exchange Rates | The most significant closing exchange rates and the approximate average exchange rates for statement of financial position accounts and statement of operations accounts as of December 31, 2017, 2016 and 2015, were as follows:
|  | 2017 |  |  | 2016 |  |  | 2015 |
Currency |  | Closing |  |  | Average |  |  | Closing |  |  | Average |  |  | Closing |  |  | Average |
Dollar |  |  | 19.6500 |  |  |  | 18.8800 |  |  |  | 20.7200 |  |  |  | 18.7200 |  |  |  | 17.2300 |  |  |  | 15.9800 |
Euro |  |  | 23.5866 |  |  |  | 21.4122 |  |  |  | 21.7945 |  |  |  | 20.6564 |  |  |  | 18.7181 |  |  |  | 17.6041 |
British Pound Sterling |  |  | 26.5361 |  |  |  | 24.4977 |  |  |  | 25.5361 |  |  |  | 25.0731 |  |  |  | 25.4130 |  |  |  | 24.3638 |
Colombian Peso |  |  | 0.0066 |  |  |  | 0.0064 |  |  |  | 0.0069 |  |  |  | 0.0062 |  |  |  | 0.0055 |  |  |  | 0.0058 |
Egyptian Pound |  |  | 1.1082 |  |  |  | 1.0620 |  |  |  | 1.1234 |  |  |  | 1.8261 |  |  |  | 2.2036 |  |  |  | 2.0670 |
Philippine Peso |  |  | 0.3936 |  |  |  | 0.3747 |  |  |  | 0.4167 |  |  |  | 0.3927 |  |  |  | 0.3661 |  |  |  | 0.3504 |
Summary of Maximum Average Useful Lives of Fixed Assets | As of December 31, 2017, the average useful lives by category of fixed assets were as follows:
|  | Years |
Administrative buildings |  |  | 35 |
Industrial buildings |  |  | 30 |
Machinery and equipment in plant |  |  | 17 |
Ready-mix trucks and motor vehicles |  |  | 9 |
Office equipment and other assets |  |  | 6 |
Summary of Statutory Tax Rates | For the years ended December 31, 2017, 2016 and 2015, the statutory tax rates in CEMEX’s main operations were as follows:
Country |  | 2017 |  | 2016 |  | 2015
Mexico |  | 30.0% |  | 30.0% |  | 30.0%
United States |  | 35.0% |  | 35.0% |  | 35.0%
United Kingdom |  | 19.3% |  | 20.0% |  | 20.3%
France |  | 34.4% |  | 34.4% |  | 38.0%
Germany |  | 28.2% |  | 28.2% |  | 29.8%
Spain |  | 25.0% |  | 25.0% |  | 28.0%
Philippines |  | 30.0% |  | 30.0% |  | 30.0%
Colombia |  | 40.0% |  | 40.0% |  | 39.0%
Egypt |  | 22.5% |  | 22.5% |  | 22.5%
Switzerland |  | 9.6% |  | 9.6% |  | 9.6%
Others |  | 7.8% – 39.0% |  | 7.8% – 39.0% |  | 7.8% – 39.0%

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