Year	current US$
1995	13000000
1996	45000000
1997	49000000
1998	51000000
1999	61000000
2000	75000000
2001	88000000
2002	106000000
2003	114000000
2004	153000000
2005	187000000
2006	239000000
2007	314000000
2008	283000000
2009	187000000
2010	216000000
2011	220000000
2012	337000000
2013	304000000
2014	256000000
2015	179000000
2016	133000000
2017	135000000
2018	165000000
2019	192000000
2020	35000000