locations, as determined by the specific sales terms of each transaction. Our sales terms do not allow for a right of return except for matters related to any manufacturing defects on our part. 

In addition, our customers can earn certain incentives, which are included in deductions from revenue, a component of net operating revenues in the consolidated statements of income. These incentives include, but are not limited to, cash discounts, funds for promotional and marketing activities, volume-based incentive programs and support for infrastructure programs. Refer to Note 1 of Notes to Consolidated Financial Statements. The aggregate deductions from revenue recorded by the Company in relation to these programs, including amortization expense on infrastructure programs, was approximately $4.4 billion, $4.1 billion and $3.8 billion for the years ended December 31, 2008, 2007 and 2006, respectively. In preparing the financial statements, management must make estimates related to the contractual terms, customer performance and sales volume to determine the total amounts recorded as deductions from revenue. Management also considers past results in making such estimates. The actual amounts ultimately paid may be different from our estimates. Such differences are recorded once they have been determined and have historically not been significant. 

Income Taxes 

In July 2006, the FASB issued FASB Interpretation No. 48, "Accounting for Uncertainty in Income Taxes" ("Interpretation No. 48"). Interpretation No. 48 clarifies the accounting for uncertainty in income taxes recognized in an enterprise's financial statements in accordance with SFAS No. 109, "Accounting for Income Taxes." Interpretation No. 48 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Interpretation No. 48 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. Our Company adopted the provisions of Interpretation No. 48 effective January 1, 2007. As a result of the adoption of Interpretation No. 48, we recorded an approximate $65 million increase in accrued income taxes in our consolidated balance sheet for unrecognized tax benefits, which was accounted for as a cumulative effect adjustment to the January 1, 2007, balance of reinvested earnings. 

Our annual tax rate is based on our income, statutory tax rates and tax planning opportunities available to us in the various jurisdictions in which we operate. Significant judgment is required in determining our annual tax expense and in evaluating our tax positions. We establish reserves to remove some or all of the tax benefit of any of our tax positions at the time we determine that the positions become uncertain based upon one of the following: (1) the tax position is not "more likely than not" to be sustained, (2) the tax position is "more likely than not" to be sustained, but for a lesser amount, or (3) the tax position is "more likely than not" to be sustained, but not in the financial period in which the tax position