Year	current US$
1977	396800000
1978	483500000
1979	751000000
1980	823900000
1981	888900000
1982	932200000
1983	994300000
1984	1335600000
1985	1458599900
1986	1570700000
1987	1727700000
1989	1914520000
1990	1989060000
1991	2051090000.0000002
1992	2008330000
1993	2061840000.0000002
1994	2131060000
1995	2333910000
1996	2513240000
1997	3758600000
1998	4136399999.9999995
1999	4457700000
2000	4627100000
2001	5035700000
2002	5040100000
2003	5136400000
2004	5295900000
2005	5845600000
2006	6256100000
2007	6415100000
2008	6447700000
2009	6048200000
2010	6227300000
2011	6341300000
2012	6814600000
2013	6754300000
2014	7184100000
2015	7536700000
2016	7652200000
2017	8245400000
2018	8434000000
2019	7976800000
2020	6520500000
2021	8047800000
2022	8674600000
2023	9672300000