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Quarterly report pursuant to Section 13 or 15(d)

INCOME TAXES

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INCOME TAXES
6 Months Ended
Jun. 30, 2017
Income Tax Disclosure [Abstract] Ìý
Income Taxes
NOTE 9 - INCOME TAXES
Our 2017 estimated annual effective tax rate before discrete items is approximately 1.3%. The annual effective tax rate differs from the U.S. statutory rate of 35% primarily due to the reversal of valuation allowance from operations in the current year and deductions for percentage depletion in excess of cost depletion related to U.S. operations. The 2016 estimated annual effective tax rate before discrete items at JuneÌý30, 2016 was 3.1%.