Year	constant 2015 US$
1970	15659.971863607767
1971	16243.363587044329
1972	16935.969728569748
1973	17776.56548516242
1974	17833.721721980353
1975	17728.09542460463
1976	18421.50507982048
1977	18886.18369689438
1978	19572.90402342199
1979	20012.073630017647
1980	19984.792147124055
1981	19718.517676854073
1982	19811.36650313446
1983	20115.719312142348
1984	20539.31599838811
1985	20986.901494720096
1986	21958.289206613754
1987	22526.66902530661
1988	23468.533764156033
1989	24272.861881520486
1990	25199.819609574643
1991	25752.02405363062
1992	26209.385745581916
1993	26020.633230969794
1994	26483.091686844724
1995	27080.06421976777
1996	27510.070726954837
1997	28184.245727030015
1998	29038.846410041628
1999	29870.200312536264
2000	30600.201183021298
2001	31145.97816771721
2002	31305.732650264083
2003	31430.072946495595
2004	32067.624862278826
2005	32372.487080809708
2006	33210.207623895985
2007	33997.10135426081
2008	33636.59934561641
2009	32545.631517170437
2010	32997.48888453446
2011	33403.467581701494
2012	33032.90100773315
2013	32986.34316138959
2014	33409.26951580636
2015	34157.17294017029
2016	34927.83900798085
2017	35665.94950111905
2018	36228.56768496901
2019	36791.138202507915
2020	34484.5441953521
2021	36557.21228179376
2022	36674.35407898167