These excerpts taken from the EFX 10-K filed Feb 26, 2009.
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2008 revenue increased 5%, or $92.7 million, compared to 2007 primarily due to the full year inclusion of TALX, which was acquired on May 15, 2007. Revenue in our four other business units collectively declined by $33.0 million, or two percent, as growth in our International, North America Personal Solutions and North America Commercial Solutions segments through the first nine months of the year was able to partially, but not fully, offset an eight percent decline in our USCIS business. Although the impact of foreign currency exchange rates on 2008 full year revenue growth was minimal, a strengthening of the U.S. dollar in the fourth quarter of 2008 compared to 2007 exchange rates negatively impacted fourth quarter revenue growth. If foreign exchange rates remain at levels consistent with December 31, 2008, foreign currency translation would negatively impact expected 2009 revenue growth by approximately four percent.
The 2007 increase in revenue, as compared to 2006, is primarily due to $179.4 million of incremental revenue from our acquisition of TALX. Additionally, double-digit growth in our International, North America Personal Solutions and North America Commercial Solutions segments also contributed to the increase in revenue, as discussed in greater detail in "Segment Financial Results" below. Foreign currency had a favorable impact on 2007 revenue growth of $32.5 million, or 2%, when using 2006 exchange rates.
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The financial results of TALX's operations are included in our Consolidated Financial Statements beginning on May 15, 2007, resulting in a partial period for 2007. This is the primary reason for the significant increase in revenue for 2008, as compared to 2007. The Work Number revenue for the third and fourth quarters of 2008, as compared to the same periods in 2007, increased 12 percent due to growth in the government and consumer collections sectors. For Tax and Talent Management Services, revenue declined two percent for the third and fourth quarters of 2008, as compared to 2007, as a result of reduced government hiring activity which impacted our Talent Management business. This decrease was partially offset by steady growth in Tax Management Services, driven by increased unemployment compensation claims activity.
TALX acquisition-related amortization expense was $54.5 million for 2008, compared to $34.0 million for 2007. Total employment records in The Work Number database increased during the year to 188.9 million at December 31, 2008, compared to 165.9 million at December 31, 2007.