Data from 2009 for 56 of the largest German companies indicate that the average cost per hour of their in-house lawyers was €148. At 1.5 US dollars per Euro as the approximate exchange rate, the cost was in the range of $222 an hour, almost precisely what the equivalent would have been for Fortune 150 US companies.
The German data comes from the General Counsel Benchmarking Report for 2009 of Otto Henning & Co. at 103. The report points out that the fully-loaded cost per hour had risen 5.2 percent from 2005 to 2007 and 5.1 percent during the next two years. Those increases also probably match quite closely to the US figures.