Year	current US$
1995	190000000
1996	221000000
1997	200000000
1998	213000000
1999	222000000
2000	189000000
2001	187000000
2002	358000000
2003	387000000
2004	381000000
2005	354000000
2006	373000000
2007	372000000
2008	356000000
2009	343000000
2010	352000000
2011	380000000
2012	364000000
2013	381000000
2014	402000000
2015	357000000
2016	372000000
2017	386500000
2018	416000000
2019	474000000
2020	205000000