Year	current US$
1986	282.7892217754568
1987	290.31071699825316
1988	334.90163625146664
1989	325.13157380769036
1990	345.8540187364752
1991	378.10674228428473
1992	414.0232067448528
1993	413.0363817170712
1994	412.05327971572456
1995	413.72489417867166
1996	423.7919847140945
1997	414.60739113038755
1998	379.77304861531337
1999	362.97890699876336
2000	303.61568292782613
2001	280.7334056886147
2002	289.7961954584607
2003	293.89921081830164
2004	315.4581581645823
2005	232.21364024009767
2006	379.2948133502536
2007	555.6144927354096
2008	597.2501845807479
2009	546.4147912588159
2010	548.5574410822874
2011	523.451640853874
2012	572.4182451806058
2013	590.4704022842069
2014	607.4846669437788
2015	608.8353099967582
2016	565.323170092766
2017	675.3979159992547
2018	749.6005782850917
2019	844.5505231857654
2020	811.1766260601146
2021	865.8993294888465