This figure shows the trends in US carbon dioxide emissions between 1990 and 2004. The data indicate that carbon dioxide emissions increased 15.8% between 1990 and 2004.

Go to Figure 4D [1]
Links:
[1] http://www.pewclimate.org/global-warming-basics/facts_and_figures/us_emissions/usco2elecpower.cfm
[2] http://www.pewclimate.org/global-warming-basics/facts_and_figures/us_emissions
[3] http://www.pewclimate.org/global-warming-basics/facts_and_figures/us_emissions
[4] http://www.pewclimate.org/global-warming-basics/facts_and_figures