Operating EBITDA was $55.9 million at 31.3% of total revenue, compared to $45.4 million at 29.5% of total revenue last year. The $10.5 million increase was primarily the result of higher franchise revenues and higher Company-operated restaurant operating profit, partially offset by our strategic investments to accelerate global sales and new restaurant development. Operating EBITDA is a supplemental non-GAAP measure of performance. See the heading entitled “Management’s Use of Non-GAAP Financial Measures.”
Income tax expense was $17.3 million, at an effective tax rate of 36.3%, compared to an effective tax rate of 34.6% in 2011. The prior year income tax expense included a tax benefit of $0.8 million, or 2.2%, for work opportunity tax credits related to prior years. Excluding the impact of these tax credits, the 2012 effective rate was lower than 2011 due to minor favorable adjustments to income tax reserves, partially offset by higher state income taxes. Other differences in the effective tax rate and the statutory rates are due to changes in estimated income tax reserves.
Reported net income was $30.4 million, or $1.24 per diluted share, compared to $24.2 million, or $0.97 per diluted share last year. Adjusted earnings per diluted share for fiscal 2012, which included approximately $0.01 for the 53 rd week of operations, were $1.24 compared to $0.99 in 2011, a 25% increase. Adjusted earnings per diluted share is a supplemental non-GAAP measure of performance. See the heading entitled “Management’s Use of Non-GAAP Financial Measures.”
As a result of strong revenue and operating profit, the Company generated free cash flow of $36.7 million in 2012, compared to $28.5 million in 2011. As a percentage of total revenue, free cash flow increased to 20.5%, compared to 18.5% last year. The Company’s free cash flow margin is amongst the highest in the industry. Free cash flow is a supplemental non-GAAP measure performance. See the heading entitled “Management’s Use of Non-GAAP Financial Measures” for the Company’s revised definition of free cash flow.