Year	constant 2011 PPP $
1991	18341.048828125
1992	20475.6015625
1993	21392.4375
1994	21285.736328125
1995	21057.966796875
1996	20746.921875
1997	20121.361328125
1998	20157.8671875
1999	20476.361328125
2000	21504.171875
2001	21236.51171875
2002	21623.140625
2003	22799.904296875
2004	22972.478515625
2005	22633.162109375
2006	22186.76953125
2007	21196.970703125
2008	20821.7421875
2009	20484.09765625
2010	20622.0625
2011	20376.451171875
2012	20606.9765625
2013	19744.71875
2014	20113.484375
2015	20118.841796875
2016	18919.78515625
2017	18726.12109375
2018	18642.841796875
2019	18508.841796875