Year	current US$
1995	28000000
1996	28000000
1997	28000000
1998	26000000
1999	21000000
2000	24000000
2001	23000000
2002	33000000
2003	36000000
2004	34000000
2005	39000000
2006	36000000
2007	43000000
2008	39000000
2009	35000000
2010	38000000
2011	40000000
2012	35000000
2013	37000000
2014	37000000
2015	30000000
2016	53000000
2017	62000000
2018	68000000
2019	67000000
2020	26000000