Real GDP per capita (measured in 2009 dollars) was $52,444 in 2017 and has been growing each year since 2010. 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. Reasons for slower growth since 2000 are debated by economists and may include aging demographics, slower population and growth in labor force, slower productivity growth, reduced corporate investment, greater income inequality reducing demand, lack of major innovations, and reduced labor power. The U.S. ranked 20th out of 220 countries in GDP per capita in 2017.  Among the modern U.S. Presidents, Bill Clinton had the highest cumulative percent real GDP increase during his two terms, Reagan second and Obama third.
Question: How many countries were ahead of the United States out of 220 countries in GDP capita in 2017?
Answer: 180