Year	current US$
1995	25000000
1996	33000000
1997	62000000
1998	52000000
1999	50000000
2000	50000000
2001	48000000
2002	57000000
2003	57000000
2004	67000000
2005	75000000
2006	79000000
2007	76000000
2008	75000000
2009	70000000
2010	81000000
2011	87000000
2012	103000000
2013	129000000
2014	153000000
2015	150000000
2016	214000000
2017	341000000
2018	353000000
2019	388000000
2020	217000000