Year	constant 2011 PPP $
1991	43064.86328125
1992	43420.7265625
1993	41850.6796875
1994	40690.3046875
1995	41830.21484375
1996	41327.51953125
1997	42315.953125
1998	41331.16796875
1999	39538.7734375
2000	39561.08984375
2001	39323.05859375
2002	36494.28125
2003	33267.796875
2004	37095.9921875
2005	37669.21875
2006	39234.48828125
2007	41477.9609375
2008	42199.76171875
2009	40760.03125
2010	39698.03125
2011	39881.6484375
2012	41569.1796875
2013	41729.9375
2014	39238.26171875
2015	36464.40234375
2016	32896.046875
2017	29705.740234375
2018	27550.140625
2019	27174.22265625