Year	constant 2015 US$
1970	17203.064687793903
1971	17607.21649348708
1972	18347.487502787477
1973	19257.58315525257
1974	19089.70388458926
1975	18923.783148870294
1976	19698.839474979373
1977	20294.749451113224
1978	21072.775249584905
1979	21488.143282648503
1980	21255.04330861335
1981	21467.098190962188
1982	21343.008147948276
1983	21845.58582057226
1984	23015.773079697676
1985	23685.622134437464
1986	24358.5851580297
1987	25131.359424517275
1988	26244.301089763685
1989	26897.027070197404
1990	27361.005102993007
1991	27419.548333555576
1992	27896.26429775942
1993	28118.10975510362
1994	28971.994447253397
1995	29732.056684544386
1996	30531.599613348753
1997	31450.856109092143
1998	32310.198588027957
1999	33272.84326007406
2000	34411.89313628646
2001	34851.30222320251
2002	35176.59749903459
2003	35689.63702181639
2004	36669.0221482
2005	37450.302245493294
2006	38373.49869291299
2007	38859.04592471877
2008	38239.302040455346
2009	37185.85827036218
2010	38201.92206865374
2011	38685.3826248158
2012	39113.426116376904
2013	39474.386688088336
2014	40229.78027112644
2015	41128.180490054954
2016	41625.725603953
2017	42557.80471876985
2018	43314.37893592503
2019	44045.80508406036
2020	42040.867532888245
2021	44529.715345588986
2022	45399.450933730936