Staying healthy and happy is a struggle for about half of Americans, according to a massive survey that attempts to measure the nation's general welfare, much like the Dow Jones Industrial Average portrays the health of the stock market.

The Gallup-Healthways Well-Being Index, based on interviews of more than 100,000 people so far, shows that 47 percent of Americans are struggling and 4 percent are suffering. Forty-nine percent of respondents are reported to be thriving based on a personal assessment of how they feel about their lives at the time of the survey, and where they think they'll be in five years.

Are you happy and/or healthy?