Only a third of U.S. adults say that they are very happy - minorities show particularly pronounced declines in the past two years, a U.S. survey indicates

A Harris Poll of 2,345 U.S. adults surveyed online April 10-15, 2013 by Harris Interactive found that certain groups, such as minorities, recent graduates and the disabled, trended downward in the last couple of years. "Our happiness index offers insight into what's on the minds of Americans today and is a reflection of the state of affairs in our country," Regina Corso, senior vice president of the Harris Poll, said in a statement. "While the attitudes on the economy may be improving, we're seeing that this is not translating into an improvement in overall happiness." Since last measured two years ago, the Happiness Index was especially low among the Hispanic-American population. Americans earning under $50,000 per year were less likely to qualify as very happy than in 2011 - down from 33% to 29% among those earning less than $35,000, and from 35% to 32% among those earning between $35,000-$49,999.