I don't have a graph but according to the U.S.D.A., per capita consumption of high fructose corn syrup in the U.S. has been matched with an almost equal decline in the per capita use of sugar. HFCS is a sugar replacement. Where there was once sugar (or would be sugar) there is now HFCS. You can thank government protection of our inefficient sugar industry for that since it forces us to pay two to three times the world price for sugar.
More importantly, consumption of HFCS has declined since its peak in 1999. The USDA estimates per capita sugar consumption in 2004 was 44.0 lbs per year and 42.3 lbs per year for HFCS.