Year	constant 2015 US$
1991	803.1666677238987
1992	737.0398126517069
1993	741.6189155190921
1994	796.7232164142965
1995	843.0556347923821
1996	890.1255302617787
1997	868.9044598647087
1998	970.4209716333634
1999	1008.2495626882505
2000	1000.6416618212465
2001	1128.580001365135
2002	1183.8820271941136
2003	1247.2308696096363
2004	1439.0358561514524
2005	1614.7434742362711
2006	1629.4708355523828
2007	1801.695200058675
2008	1870.0643143898772
2009	1948.2140005053054
2010	1643.76577579646
2011	1886.8980508943234
2012	2087.9768017836027
2013	2267.3344850573176
2014	2431.1543459005447
2015	2785.3549141889
2016	2674.4451654682352
2017	2580.2235497284696
2018	2441.489793494411
2019	2332.116653011852
2020	2166.8494911331636
2021	2062.3222870272934
2022	2080.1257111269842