Year	constant 2011 PPP $
1991	15844.4248046875
1992	16615.318359375
1993	16677.22265625
1994	17249.748046875
1995	17350.46484375
1996	17987.662109375
1997	17458.5625
1998	17541.296875
1999	19054.22265625
2000	18682.86328125
2001	18731.2109375
2002	19060.00390625
2003	18985.634765625
2004	19719.462890625
2005	19526.67578125
2006	19379.22265625
2007	18667.35546875
2008	18281.107421875
2009	17590.857421875
2010	17620.671875
2011	17671.107421875
2012	18129.638671875
2013	19189.025390625
2014	20588.947265625
2015	21443.1875
2016	21500.583984375
2017	22148.3984375
2018	22820.7890625
2019	23569.73046875