Bush nominal GDP increased 43% over his term. To date nominal GDP under Obama is up less than 20%.
Bush nominal GDP rose $4.4338 trillion from the end of 2000 to the end of 2008, from $10.2848 trillion to $14.7186 trillion. That comes to $554.225 billion per year for eight years.
Obama nominal GDP has risen to date $2.8812 trillion from the end of 2008 to the end of 3Q2014, from $14.7186 trillion to $17.5998 trillion to date. That comes to $501.078 billion per year for 5.75 years.
The $53.147 billion difference amounts to a difference of 9.59% on average per year to date.