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Income Taxes
3 Months Ended
Mar. 31, 2016
Notes to Financial Statements  
Note 10 - Income taxes

The effective tax rate for the three months ended March 31, 2016 was 38.8% compared to 49.9% for the three months ended March 31, 2015. The difference between the statutory and effective tax rate in 2015 reflects certain operating expenses that are not fully deductible for federal income tax purposes.