The assessment was done on the glyphosate and not on the GMO as such. We wanted to use this chart to show the presence of glyphosate in the waterways compared to what it was previously. In 2002, there was a low concentration. It has increased since then. In 2010, the concentration was double or even triple what it was before. So it is not correct to claim that GMOs will lead to a drop in the use of herbicides.
On March 5th, 2013. See this statement in context.