Year	current US$
1970	166.58738707273292
1971	176.17468334697384
1972	192.12259680660839
1973	237.53102922243116
1974	283.32353457025806
1975	302.67622169892644
1976	316.938092033775
1977	348.6266565717182
1978	368.948258544516
1979	414.2836140680767
1980	476.6904518612217
1981	543.8160168311306
1982	524.2930060404725
1983	492.2374910981144
1984	487.3674801919605
1985	495.3229157119262
1986	508.87791427420945
1987	503.80727013314765
1988	537.6170998171518
1989	557.7792977509572
1990	630.854093964157
1991	650.0040201356277
1992	695.5360704847678
1993	741.3166351497767
1994	814.1271628292178
1995	915.1546242751292
1996	998.6549234912313
1997	1044.8372390781587
1998	1008.5536762598045
1999	968.5246904424741
2000	1028.3786018072744
2001	1025.817140392074
2002	1033.3403959303396
2003	1138.0103128872252
2004	1324.6544790414048
2005	1544.4535833786338
2006	1811.4917991509853
2007	2221.0492303717992
2008	2588.021616641497
2009	2524.486367745627
2010	2972.7298623065367
2011	3360.114331061695
2012	3549.451192898876
2013	3693.6126702439474
2014	3799.6199511094756
2015	3557.359263339945
2016	3547.3518180761607
2017	3851.4283542444214
2018	3972.9328637412746
2019	4015.5690657601463
2020	3805.820226722139
2021	4339.459294632021