According to the U.S. Census:

Both the percentage and number of people without health insurance decreased in 2007 . The percentage without health insurance was 15.3 percent in 2007, down from 15.8 percent in 2006, and the number of uninsured was 45.7 million, down from 47.0 million.

. The percentage without health insurance was 15.3 percent in 2007, down from 15.8 percent in 2006, and the number of uninsured was 45.7 million, down from 47.0 million. The percentage of people covered by private health insurance was 67.5 percent, down from 67.9 percent in 2006.

The percentage of people covered by government health insurance programs increased to 27.8 percent in 2007, from 27.0 percent in 2006.

See also a USA Today story concerning these Census numbers on health insurance as well as income and poverty.