Year	constant 2015 US$
1971	2462.3563037239855
1972	2543.2770240951113
1973	2673.9529523851743
1974	2665.191278632161
1975	2678.7046469614734
1976	2862.4109449800567
1977	3179.7699752819485
1978	3166.649925591974
1979	3166.150625011078
1980	3132.4286519517673
1981	3043.4828111456386
1982	2862.3258660925053
1983	2698.3778236354674
1984	2614.967776324915
1985	2525.5026807416157
1986	2526.078964985364
1987	2442.5729826585734
1988	2500.5191937449276
1989	2535.791125509262
1990	2499.416993165483
1991	2615.9951902572143
1992	2608.9238782552625
1993	2681.3344719880906
1994	2733.6328319134136
1995	2816.6814668604297
1996	2787.8143550572845
1997	2875.028595439964
1998	2989.8935256151926
1999	2994.830657387529
2000	2970.94646755509
2001	2868.608911096626
2002	2859.4543532400944
2003	2829.7650637990787
2004	2809.576721173963
2005	2798.9493227006215
2006	2851.367923373036
2007	2942.366605689382
2008	2966.9656677733947
2009	2984.7622548322593
2010	2993.5898847020603
2011	3077.7364503583535
2012	3153.2847380180956
2013	3193.2635617828005
2014	3273.519742259814
2015	3439.847119790654
2016	3472.359665246168
2017	3513.370224846295
2018	3574.9521339611656
2019	3724.4330271655663
2020	3663.6105228007486
2021	3757.908665900832