A new study that estimates that by 2015, 75 percent of adults will be overweight and 41 percent will be obese, according to a FoxNews.com report.

The percentage of adults in the U.S. that were obese increased from 13 percent in the 1960s to 32 percent in 2004, according to researchers at the Johns Hopkins Bloomberg School of Public Health's Center for Human Nutrition.

The proportion of overweight and obese Americans has increased at an average rate of 0.3 to 0.8 percentage points a year. Poorer Americans and some minority groups have been affected disproportionately, according to the analysis, which was published online in advance of the 2007 issue of the journal Epidemiologic Reviews.

Check out the full report at FoxNews.com.

-- Amanda Barrett, amNY.com