Year	constant 2011 PPP $
1991	6320.93896484375
1992	5476.7490234375
1993	5213.68115234375
1994	4721.951171875
1995	4863.16015625
1996	4899.80419921875
1997	4949.59912109375
1998	4960.40087890625
1999	5004.9189453125
2000	5015.044921875
2001	4899.72412109375
2002	4835.43310546875
2003	4784.37890625
2004	4562.583984375
2005	4590.587890625
2006	4621.087890625
2007	4706.65185546875
2008	4580.06103515625
2009	4616.69287109375
2010	4230.212890625
2011	4314.11181640625
2012	4285.64111328125
2013	4356.51318359375
2014	4359.32177734375
2015	4302.05908203125
2016	4263.9091796875
2017	4211.498046875
2018	4213.05419921875
2019	4216.81005859375