We've got one!
Map - http://www.nationalaccountsofwellbeing.org/explore/indicators/zwbi - 0 to 10, where 0 means suicidal, (I assume), and 10 means Euphoric, (perhaps)! We are greenish with envy, or apparently not happy, but not miserable.
I haven't seen the Prime Minister's version yet;
Last seen in Carter years, or last noticed then. It's making a comeback under Obama. Anything over 10 enters misery territory. Currently at 12.7 as of May 2011.