Year	constant 2015 US$
1969	20691.71904736454
1970	21560.554318697006
1971	22036.117094073696
1972	22630.449204303102
1973	23822.23431895113
1974	24010.32021696983
1975	23574.328874729472
1976	24661.202514994406
1977	24990.248608083133
1978	25361.891655465475
1979	25617.5036908678
1980	26294.86804575815
1981	26014.057522646763
1982	25674.140723193854
1983	26172.7909489124
1984	27136.22962336087
1985	27149.16494608286
1986	27707.72208711464
1987	27975.792244589316
1988	28622.636172428196
1989	29772.687927947754
1990	30335.780265633974
1991	30970.22436940694
1992	30996.405833080935
1993	31300.013649185144
1994	32274.24083074507
1995	33449.286233343315
1996	34637.63088446642
1997	36071.32282954124
1998	37167.99259369018
1999	39072.33819211495
2000	40408.74864009733
2001	40503.8921000717
2002	40247.280795611776
2003	40649.86701441645
2004	41128.47100737347
2005	41889.143085196854
2006	43759.52836878195
2007	45022.69155082847
2008	44133.86843503653
2009	42777.977385558224
2010	44053.217417544474
2011	44472.443541477995
2012	43561.03383629809
2013	43575.3828116492
2014	43756.0419357611
2015	44732.95982592606
2016	44857.7516450336
2017	46481.184766347
2018	47596.679604094534
2019	47497.8970117665
2020	44821.817149174974
2021	49651.63696245785
2022	49500.60352579972