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A new report shows that diabetes rate in Washington state increased at a higher rate than any other western state in the last 15 years.

According to the report by the Centers for Disease Contol and Prevention, Washington's rate in 2010 was more than double the rate in 1995.

The biggest changes have been in the south. The diabetes rate in Oklahoma more than tripled over 15 years, and also boomed in Southern states like Kentucky, Georgia and Alabama.

Most cases are the kinds of diabetes linked to obesity. Health officials believe extra weight explains the increases in the South and Southwest. They also say the rates overall are up because people with diabetes are living longer.

The diabetes rate more than doubled in several Northern states, too, including Idaho, Montana, Wyoming, South Dakota, Minnesota, Missouri, Ohio and Maine.

APMedical Writer Mike Stobbe and KING 5's Elizabeth Wiley contributed to this report.

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