Year	constant 2011 PPP $
1991	20836.509765625
1992	18845.146484375
1993	16192.9970703125
1994	12443.685546875
1995	11325.1953125
1996	10547.404296875
1997	10544.1591796875
1998	10817.9306640625
1999	11083.3359375
2000	11585.640625
2001	12811.3046875
2002	13420.6572265625
2003	14596.275390625
2004	16394.66796875
2005	16668.341796875
2006	17902.685546875
2007	19311.318359375
2008	19838.001953125
2009	17407.671875
2010	18056.763671875
2011	19046.73046875
2012	19262.185546875
2013	19093.68359375
2014	18816.015625
2015	17000.912109375
2016	17630.896484375
2017	18294.404296875
2018	19095.33984375
2019	19965.7578125