This appears to be from 2014. Prior to 2014, using GMO seeds "required" farmers to plant an in-field refuge of non-resistant crops. Since farmers could, short term, get better yields if they didn't plant these refuge plants, they often chose not to. In 2014 companies started mixing in non-resistant seeds, known as "refuge in bag". It's seen some mixed results, but for the most part, it looks like it has helped.