bmdesign:

Facebook’s Gross Gross National Happiness index is a measure of the national mood through its 100 million American users. Facebook counts the number of “positive” and “negative” words used in each status update, converts them to percentages, finds average percents based on all users that day, then subtracts the “negative percent” from the “positive percent to get a value for the y axis—but the results are clear: Despite a deepening recession and prolonged wars, Americans were happier in 2009 than in 2008!!