Here is one analysis, from another thread I started in the CE forum, which you can find here http://christianforums.com/showthread.php?t=7266913:
80-85% are christians
10-15% are non-religious (atheist, agnostic, other)
45-50% Accept evolution (from total population)
Thus, even if 100% of non-religious accept evolution, then at the bare minimum 30% accept it who are non-non-religious.
So that's at a bare minimum 2 times more chrisitans accept evolution than non-religious folks.
and here is another (where the "source" is a link to a source, but which will not link in this cut and paste) from that same thread.
The following only refers to citizens of the USA
"According to a 2005 Pew Research Center poll, 70 percent of evangelical Christians believe that living beings have always existed in their present form, compared with 32 percent of Protestants and 31 percent of Catholics. "
source
This suggests that 68% of Protestants and 69% of Catholics (in the USA) accept evolution; evolution being the only other alternative to "living beings have always existed in their present form."
Catholic population USA: 23% 69,135,254;
source
Protestant population USA: 44% (2006) 132,000,000
source
Evangelical population in USA: 22% (2006) 66,000,000 (separated from the other protestants)
source
And, doing a bit of calculation, 30% (100%-70%), 1,126,2037 of evangelicals believe in evolution.
SO.......
From the figures given, in 2006 Christians accounted for 89% of the U. S. population
AND.......
The totals of those who apparently believe in evolution:
68% of the Protestants = 89,000,000
69% of the Catholics = 47,000,000
30% of evangelicals = 1,100,000
GRAND TOTAL of Christians who apparently believe in evolution. . . . 137,000,000
Or,
51% of the Christens in America (Catholics + Protestants + evangelicals)
appear to believe in evolution.
A Harris poll in 2006 found that 4% of Americans said they were atheists. (14% said they were without a religion). 4% of 300 million = 12,000,000 atheists.
So, of the 149,000,000 people in the USA who believe in evolution, 92% of them are Christians