Year	current US$
1972	452.12445300132475
1973	600.9367163566762
1974	760.578225701205
1975	888.6172305609193
1976	949.1203890879201
1977	979.5310623006561
1978	1029.295863279089
1979	1218.0354845929182
1980	1324.557761868811
1981	1419.4509816682116
1982	1288.3582534894788
1983	1176.5441059898467
1984	1200.4267632441256
1985	1161.1811655181516
1986	1272.3814235320226
1987	1281.8919254410887
1988	1347.321022877912
1989	1362.7117670509842
1990	1399.1202136044315
1991	1413.6566532315926
1992	1548.7859723514814
1993	1620.697603442777
1994	1723.3741630442123
1995	1914.8373530673375
1996	2063.017531549342
1997	2024.2669055879041
1998	1890.0419761051878
1999	1880.6079372376498
2000	1781.8842888724912
2001	1729.200728212116
2002	1693.138071217687
2003	1827.5673836152978
2004	2153.7352591762706
2005	2476.6358140711372
2006	2550.529197983787
2007	2687.4849388419575
2008	2871.531267139237
2009	2867.806217520698
2010	2878.5417451384633
2011	3022.567290316289
2012	3251.9692400209274
2013	3610.812350100011
2014	3746.1858858647684
2015	3789.7159365191155
2016	3837.936425582502
2017	3902.6013925198863
2018	4209.337017960925
2019	4342.644886533867
2020	3887.049487298996
2021	3801.04551678311
2022	4159.776196620127
2023	4298.05914114887