Year	current US$
1960	81000000
1961	72000000
1962	65000000
1963	71000000
1964	98000000
1988	318000000
1989	387000000
1990	380000000
1991	410000000
1992	541000000
1993	572000000
1994	604000000
1995	714000000
1996	938000000
1997	646000000
1998	829000000
1999	1140000000
2000	1091000000
2001	1327000000
2002	1504000000
2003	1864000000
2004	2309000000
2005	2619000000
2006	3060000000
2007	4191000000
2008	5575000000
2009	4553000000
2010	4406000000
2011	5383000000
2012	4879000000
2013	4920000000
2014	5222000000
2015	4302000000
2016	4613000000
2017	5271000000
2018	5925000000
2019	5897000000
2020	5570000000
2021	7718000000
2022	8399000000
2023	8613000000