Year	constant 2015 US$
1990	379.0720671359676
1991	439.0290151732721
1992	525.5181235945255
1993	431.52718727197396
1994	386.4608465047315
1995	407.2938517729721
1996	464.25280888020023
1997	475.57805806439285
1998	578.8987575218422
1999	538.3813261307151
2000	495.8652169291948
2001	459.275780319694
2002	447.2732691350576
2003	530.7083777850543
2004	615.7667700527951
2005	681.0186893311844
2006	448.5028761110284
2007	740.170633117712
2008	756.9978624050751
2009	762.9084230109675
2010	773.043033622681
2011	809.961822808749
2012	779.9545058278559
2013	1018.4565421927274
2014	1297.873748395937
2015	1456.971441499025
2016	1378.349616946891
2017	1402.096388400536
2018	1501.0701522070954
2019	1462.0445827102978
2020	1498.0774396401796
2021	1452.6196412259817
2022	1523.5514228604898