Year	current US$
1995	294000000
1996	249000000
1997	237000000
1998	191000000
1999	181000000
2000	37000000
2001	42000000
2002	51000000
2003	51000000
2004	61000000
2005	68000000
2006	119000000
2007	141000000
2008	136000000
2009	138000000
2010	164000000
2011	119000000
2012	113000000
2013	110000000
2014	109000000
2015	107000000
2016	109000000
2017	110000000
2018	106000000
2019	108000000
2020	27000000