US cuts poverty rate roughly in half (23% to 11%) between 1960-1974.
Figure 2. US Poverty Rates by Age Group, 1959-2012 shows that in 1963 the poverty rate (total) was around 23 percent and by 1973-1974 the poverty rate was roughly 11 percent.
Source: Congressional Research Service, Thomas Gabe, "Poverty in the United States: 2012," November 13, 2013, Figure 2, 5, September 24, 2014, http://fas.org/sgp/crs/misc/RL33069.pdf.