Year	current US$
1980	573.7678095688726
1981	512.5987347451756
1982	340.9298052937719
1983	407.05499394542585
1984	376.64150235505093
1985	410.58380988495236
1986	447.1359500347453
1987	260.49054752040183
1988	342.0177861861085
1989	265.2817849429151
1990	299.9016973035874
1991	193.63083924178466
1992	257.4886540252081
1993	372.75140250400773
1994	432.56687469218434
1995	469.9093920706622
1996	634.4596093411955
1997	665.6010107743134
1998	716.2415532045284
1999	674.2288495160539
2000	751.961693495184
2001	751.9910477025988
2002	749.843347366285
2003	761.0295710162841
2004	800.549684792542
2005	861.0499279917758
2006	2735.668262129576
2007	3222.512401801959
2008	3587.135195616615
2009	3744.887244951029
2010	3920.4166693856528
2011	4153.935975922067
2012	4633.657614770756
2013	4812.8317286404435
2014	4871.792203362255
2015	5129.651994278897
2016	4969.510691284991
2017	5376.0324061361125
2018	5518.211384266404
2019	5897.383888471079
2020	5713.394581841603
2021	6359.173204895179