This figure shows the trends in US carbon dioxide emissions between 1990 and 2009. Emissions increased by 7 percent between 1990 and 2009. Emissions have declined since 2007 mostly due to the global recession. (Friedlingstein, 2010)
[1]
Source: Inventory of U.S. Greenhouse Gas Emissions and Sinks 1990-2009 (EPA 2011)
Links:
[1] http://www.pewclimate.org/docUploads/facts-figures-us-emissions-trends.jpg