2007 — Roundup became the most used herbicide in the U.S. by 2007. The result of Roundup’s rising popularity was Roundup Ready crops, which began hitting the market in the late 1990s. From the introduction of Roundup Ready crops through 2016, the global glyphosate usage increased by more than 15 times. The U.S. made up 72% of the usage during that time.
Reference: Moncivais, Katy. “Roundup Cancer Lawsuit: 2020 Updates & Settlements.” Consumer Safety, 8 Jan. 2021, https://www.consumersafety.org/product-lawsuits/roundup/.