I got the data from the data at the U.S. Bureau of Labor Statistics.
When did Obama get sworn in? Jan 2009. When did Bush's presidential budget expire? Oct 1, 2009. Bush's monetary policies were entirely in effect until the unemployment got to 10%.
Note in this chart the gaps I made to show the change in ownership of the federal budget. Bush drove the car off the cliff and then handed the wheel to Obama so he gets the blame for the crash at the bottom. Note also that Reagan had no one to blame for running unemployment to 10.8% in 1983, and no one else could take credit for unemployment being the lowest in 40 years during Clinton's last year (even if Shrub Boy tried)
I find it intriguing that Reagan, Bush, and the Son-of-a-Bush all had high jumps in unemployment in their first years as president, while Clinton and Obama have seen unemployment drop in their first year. There must be something to it.