From 2009 to 2010 NASA's budget was decreased by ~300million per year, yet adjusted for 2007 dollars, the budget fell by ~900million to 1 billion dollars per year.
Interesting enough inflation is a strange metric. From 2008 to 2009 NASA's budget was increased 300million, yet in 2007 dollars it only rose 100million.
Source: https://en.wikipedia.org/wiki/Budget_of_NASA