![](http://i1132.photobucket.com/albums/m564/Kalpa2/chartsKalpaBigPictureAgriculture/2-9.jpg)
Between 1994 and 2004, real values increased between 2 and 4 percent annually, and in 2005 and 2006 experienced sharp annual increases of 16 percent and 11 percent respectively, before slowing to 7 percent and 6 percent annual growth in 2007 and 2008.
source: usda