Year	current US$
1995	22000000
1996	16000000
1997	9000000
1998	13000000
1999	14000000
2000	13000000
2001	15000000
2002	21000000
2003	30000000
2004	30000000
2005	34000000
2006	37000000
2007	42000000
2008	49000000
2009	47000000
2010	43000000
2011	24000000
2012	12000000
2013	13000000
2014	19000000
2015	16000000
2016	17000000
2017	18000000
2018	23000000
2019	18000000