Consolidated Results ($000) 2010 2009  2008  2010 Change 2009 Change Revenue  $ 555,351 $ 478,996  $ 502,457  15.9% (4.7)% Operating income  121,059 124,673  138,876  (2.9)% (10.2)% Operating margin  21.8% 26.0%  27.6%  (4.2)pp (1.6)pp Cash used for investing activities  $ (87,949) $ (174,675)  $ (179,124)  (49.6)% (2.5)% Cash provided by financing activities  12,525 25,320  50,737  (50.5)% (50.1)% Cash provided by operating activities  $ 123,416 $ 101,256  $ 149,339  21.9% (32.2)% Capital expenditures  (14,771) (12,372)  (48,519)  19.4% (74.5)% Free cash flow  $ 108,645 $ 88,884  $ 100,820  22.2% (11.8)% pp—percentage point(s) In 2010, we determined that the cumulative effect of adjustments  related to prior periods were material, in aggregate, if recorded in  our 2010 Consolidated Financial Statements. These amounts related  primarily to our accounting for deferred taxes and, to a lesser extent,  to expense adjustments associated with vacant office space and  rent for one of our office leases. We evaluated the effects of these  errors on our prior periods’ Consolidated Financial Statements, indi- vidually and in the aggregate, in accordance with the materiality  guidance provided by the SEC staff, as included in SAB Topics 1M  and 1N, and concluded that no prior period is materially misstated.  However, in accordance with the provisions of these SAB Topics,  we restated our Consolidated Financial Statements, as of and for  the years ended December 31, 2009 and 2008. Please see Note 2  in the Notes to our Consolidated Financial Statements for additional  information concerning the restated financial information. As noted in  How We Evaluate Our Business , we define free cash flow  as cash provided by or used for operating activities less capital expen- ditures. Please refer to the discussion on page 65 for more detail. The table on the opposite page shows the periods in which we  included each acquired operation in revenue from acquisitions. Consolidated organic revenue (revenue excluding acquisitions and  the impact of foreign currency translations) is considered a non- GAAP financial measure. The definition of organic revenue we use  may not be the same as similarly titled measures used by other  companies. Organic revenue should not be considered an alternative  to any measure of performance as promulgated under GAAP. Because we’ve made several acquisitions in recent years, compar- ing our financial results from year to year is complex. To make it  easier for investors to compare our results in different periods, we  provide information on both revenue from acquisitions and organic  revenue, which reflects our underlying business excluding revenue  from acquisitions and the impact of foreign currency translations.  We include an acquired operation as part of our revenue from acqui- sitions for 12 months after we complete the acquisition. After that,  we include it as part of our organic revenue. Restatement of Previous Periods’ Financial Information Morningstar, Inc. 2010 Annual Report 69