Obama, Clinton, McCain "middle class" Web site mentions

Using Google, I searched three candidate's Web sites for the words "middle class".
Here is what I found (in no particular order) :

Obama
185 from www.barackobama.com for "middle class"

Google search used:
"middle class" site:http://www.barackobama.com

Clinton
2,210 from www.hillaryclinton.com for "middle class"

Google search used:
"middle class" site:www.hillaryclinton.com

McCain
127 from www.johnmccain.com for "middle class"

Google search used:
"middle class" site:www.johnmccain.com