The is a new, daily survey of the happiness (and stress) of life in America that you can look at on the Internet. Healthways, Inc. and Gallup measure out situation nightly with 1,000 interviews. On a daily basis the ratio is about 5:1 in favor of happiness. Happiness Graph
What's interesting in this survey is the detailed information subsets. For example sick people with no insurance 56% reported a lot of stress compared to only 39% of those with insurance.
Too bad they didn't start this survey before the price of gas rolled over $3 per gallon ... that causes all of us a lot of stress!