Year	constant 2015 US$
1970	9264.28690938903
1971	9547.319284140221
1972	10004.079999789888
1973	10438.269397563683
1974	10398.514648098391
1975	10537.512384565625
1976	10897.678786131415
1977	11170.090101064816
1978	11506.103858042334
1979	11803.079637553199
1980	11823.340637130697
1981	11886.721468298132
1982	11951.236093188227
1983	12226.635087259801
1984	12535.17578908548
1985	12916.128426424533
1986	13322.551844611917
1987	13698.573618193323
1988	14156.577754552507
1989	14538.767650475516
1990	14834.646070609726
1991	14872.156995557805
1992	15144.064186728128
1993	15295.23005912719
1994	15621.768819852805
1995	15873.915110343783
1996	16236.847820473498
1997	16625.329661461517
1998	17067.7423966553
1999	17637.413362964904
2000	18232.926986464052
2001	18508.019198289352
2002	18762.73842092455
2003	19058.73558535713
2004	19474.050847524733
2005	19904.409529658435
2006	20263.670007265482
2007	20613.75939706681
2008	20535.072511724426
2009	20129.644873048746
2010	20429.385861602153
2011	20613.070533730097
2012	20706.62292771983
2013	20889.431994364488
2014	21162.9865644654
2015	21579.96143021143
2016	21920.91083400149
2017	22305.886377614126
2018	22650.556908067054
2019	22878.952345098754
2020	21625.631131478876
2021	22996.543408454014
2022	23758.693524856535