Year	current US$
1976	1180000000
1977	1385000000
1978	1586000000
1979	1874000000
1980	2018000000
1981	1913000000
1982	1842000000
1983	1990000000
1984	2017000000
1985	2104000000
1986	2015000000
1987	2216000000
1988	2472000000
1989	3201000000
1990	3200000000
1991	3687000000
1992	4773000000
1993	4201000000
1994	6655000000
1995	10637000000
1996	9766000000
1997	8916000000
1998	10841000000
1999	8384000000
2000	10374000000
2001	9773000000
2002	10029000000
2003	11178000000
2004	15016000000
2005	17999000000
2006	22184000000
2007	31308000000
2008	37616000000
2009	30938000000
2010	34647000000
2011	39912000000
2012	40014000000
2013	43625000000
2014	47578000000
2015	44077000000
2016	48712000000
2017	57868000000
2018	67999000000
2019	70198000000
2020	66382000000
2021	80783000000
2022	94884000000
2023	107636000000