Year	current US$
1976	446384249.9999998
1977	473766449.9999999
1978	559093050.0000001
1979	659523616.6499999
1980	631296897.2692243
1981	608474172.8927324
1982	482967182.0288289
1983	690343931.4645262
1984	750057928.8856193
1985	546394280.9349605
1986	149293283.72569507
1987	207410013.11893314
1988	312307816.9957184
1989	406223221.4714734
1990	464658861.84237164
1991	474714869.653422
1992	478631377.37894744
1993	447234734.40024495
1994	610058763.5539485
1995	750002086.6013297
1996	892753468.4425135
1997	997227183.5528442
1998	1089562484.208639
1999	882978316.1815206
2000	925031204.4326698
2001	916428083.6826012
2002	972142817.2942817
2003	1170793755.6970053
2004	1495579292.6548893
2005	1898602777.3607037
2006	3044157444.4115224
2007	3757086922.1973968
2008	4832752345.553438
2009	3970838660.9686613
2010	4882787258.972152
2011	6306486116.153618
2012	6959106066.222436
2013	7324804154.444558
2014	6859735180.800069
2015	4691613558.669006
2016	5233739110.239846
2017	6022773523.761127
2018	6497505747.07034
2019	5805061995.023809
2020	4572133974.041002
2021	5595960883.015892
2022	6124226609.97049
2023	6182659476.613844