Hawaii isn't just a nice state for a vacation. It may also be the healthiest state in which to live, at least according to one metric: Only 19 percent of Hawaiian residents suffer from obesity. That's the lowest of any state, according to the Gallup-Healthways Well-Being Index released this week. Hawaii was also one of five states that reduced its obesity rate the most between 2013 and 2014, when the survey was conducted. By contrast, obesity grew nationwide to 27.7 percent in 2014, up from 27.1 percent in 2013 and 25.5 percent in 2008, the first year that Gallup-Healthways conducted its well-being survey.