Year	constant 2015 US$
1977	211483620.878433
1978	233764997.5908278
1979	190847414.3078743
1980	216388871.6253415
1981	239822338.7716599
1982	249721445.86909363
1983	256105120.2309804
1984	266852947.64013225
1985	270644749.81276923
1986	289788417.8072275
1987	308066999.3665947
1988	332147435.33422023
1989	331512580.3328197
1990	349473877.4558208
1991	354183964.05940396
1992	361371847.1870729
1993	369182589.2574936
1994	369309888.8954283
1995	380503164.20239913
1996	392314752.0364812
1997	400889291.93451
1998	416019763.1861748
1999	417492801.8537047
2000	427263049.0651914
2001	426990264.12675995
2002	414914984.18552744
2003	441275102.06928724
2004	454737038.7808797
2005	457719487.44106364
2006	479046723.21076316
2007	509480429.5084327
2008	545760826.3198165
2009	539377658.7605203
2010	543005698.4416587
2011	541791805.4656388
2012	536054228.92729706
2013	530694004.8871189
2014	555922065.2763882
2015	540737037.037037
2016	555681105.2474403
2017	518900602.7155989
2018	537309039.6440817
2019	566874380.5544112
2020	472749937.54863685
2021	505325005.6129934
2022	533540061.0780871
2023	558681739.5701864