The percentage of adults in Washington state who are obese has more than doubled over the past two decades from 10 percent to more than 26 percent - and two-thirds, 62 percent, are either obese or overweight, according to a new report.

Washington State Obesity Rates

All states but one have obesity rate over 20%

The report by two public health groups has again delivered bad news: The nation is getting bigger and bigger every year. And looking at state-by-state statistics over the last 15 years, the groups found exponential waistline growth - Colorado, with 19.8 percent of adults considered obese according to 2010 data, would have been the nation's fattest state in 1995.

In 1995, no state had an obesity rate above 20 percent. Now, all but one state does