Gallup
Throughout 2011, an average of 17% of Americans said they were satisfied with the way things are going in the United States. That is the second-lowest annual average in the more than 30-year history of the question, after the 15% from 2008. Satisfaction has averaged as high as 60% in 1986, 1998, and 2000.
Read more: http://www.gallup.com/poll/151700/Satisfaction-2011-Ranks-Second-Lowest-1979.aspx