claim: “In 2013 the level of U.S. farm output was about 2.7 times its 1948 level, and productivity was growing at an average annual rate of 1.52%.
evidence: It grew 3.0% per year on average in the 1960s, 2.1% in the 1970s, 2.4% in the 1980s, 2.2% in the 1990s, 0.7% in the 2000s, and 0.9% from 2010 to 2017.