Year	constant 2015 US$
1970	7406.279276351545
1971	7557.140914519695
1972	7828.992730627536
1973	8257.47638789146
1974	8255.1850557048
1975	8187.40470981824
1976	8293.007937660923
1977	8735.302957672251
1978	9396.926292854694
1979	9683.699264894516
1980	9613.954555330984
1981	9663.438599296689
1982	8896.901478552154
1983	8909.305707532183
1984	9032.191827141047
1985	9431.76898603062
1986	9617.233311978212
1987	9935.947621633342
1988	10426.103727548274
1989	11149.828604770486
1990	11297.895308108598
1991	11435.870810211021
1992	11685.992857059562
1993	11965.616613871907
1994	12438.66915096391
1995	12801.592487622967
1996	13573.043977171405
1997	14361.318211141193
1998	15340.269000302435
1999	16606.976827832917
2000	18090.634486596195
2001	18647.82360832434
2002	19002.89668277761
2003	19217.80719336423
2004	19589.970424960215
2005	20514.030027430115
2006	21243.78649178648
2007	22015.950761735356
2008	21612.87760905698
2009	20255.457412889547
2010	20206.25220690954
2011	19847.033788833407
2012	19630.75428879961
2013	19591.639705346657
2014	19974.61244695178
2015	20458.731016438414
2016	21203.597727401488
2017	21516.423800241555
2018	22060.613026258812
2019	22297.810862220245
2020	19687.663156538983
2021	21149.594423419196
2022	22703.554648475965
2023	22806.836964398168