Year	constant 2011 PPP $
1991	39452.8984375
1992	42244.6015625
1993	41663.3359375
1994	42951.83203125
1995	45907.703125
1996	45478.94921875
1997	45475.61328125
1998	47106.97265625
1999	48454.4765625
2000	49355.04296875
2001	48415.87890625
2002	48650.640625
2003	48345.0859375
2004	49198.85546875
2005	50674.375
2006	51203.84765625
2007	51840.44140625
2008	52656.36328125
2009	51438.703125
2010	51280.51953125
2011	52341.359375
2012	52691.421875
2013	51558.359375
2014	50051.421875
2015	50359.6171875
2016	51003.9765625
2017	51172.984375
2018	50618.23828125
2019	51596.453125