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The decrease in the effective tax rate year-over-year was primarily due to lower charges related to unrecognized tax benefits. This reduction in the effective tax rate was partially offset by an unfavorable change in the forecasted country mix of earnings.&lt;/font&gt;&lt;/div&gt;&lt;div style="line-height:120%;padding-top:6px;font-size:10pt;"&gt;&lt;font style="font-family:inherit;font-size:10pt;"&gt;Our income tax provisions for the &lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;"&gt;six&lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;"&gt; months ended &lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;"&gt;June&amp;#160;30, 2013&lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;"&gt; and &lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;"&gt;2012,&lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;"&gt; reflected effective tax rates of &lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;"&gt;25.3%&lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;"&gt; and &lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;"&gt;26.3%&lt;/font&gt;&lt;font style="font-family:inherit;font-size:10pt;"&gt;, respectively. The decrease in the effective tax rate year-over-year was primarily due to the American Taxpayer Relief Act of 2012, which was signed into law on January 2, 2013, and which retroactively reinstated and extended certain provisions of U.S. tax law. This reduction in the effective tax rate was partially offset by an unfavorable change in the forecasted country mix of earnings.&lt;/font&gt;&lt;/div&gt;&lt;div style="line-height:120%;padding-top:6px;font-size:10pt;"&gt;&lt;font style="font-family:inherit;font-size:10pt;"&gt;Our effective tax rate can fluctuate depending on our country mix of earnings, since our foreign earnings are generally subject to lower tax rates than in the United States. 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