Really, this just does a good job of it.
Most advanced one we have i believe.
http://www.census.gov/prod/2008pubs/p60-235.pdf
When you read the whole thing it pains a much different picture then just reading the number.
From the actual census... it states it under reports insurance for a variety of reasons.
17% of people with Medicaid for example report not having any health insurance.
43 Million people are on medicaid. So that's 7.31 Million people.
So 46 million uninsured drops to 38.70.
7% of those surveyed are undocumented residents... and likely don't have health insurance. It's about 9.4... this of course
Drops us to 29.3 million
Now, 14.4% of people who make 50K or more don't get health insurance.
Along with 7.8% of people who make 75K or more.
This is about the 4th and 5th quartiles in america. (A little more but lets be conservative.)
14.4% of the 4th quartile is 8.75 + 7.8% of the 5th quartile 4.74. = 13.49 million
So that leaves us with...
15.81 Million uninsured... but there is still more. But i'm breaking this up into two posts.