Year	current US$
1995	35000000
1996	40000000
1997	38000000
1998	39000000
1999	42000000
2000	41000000
2001	39000000
2002	45000000
2003	54000000
2004	69000000
2005	73000000
2006	87000000
2007	102000000
2008	111000000
2009	115000000
2010	123000000
2011	134000000
2012	148000000
2013	136000000
2014	147000000
2015	142000000
2016	148000000
2017	166000000
2018	192000000
2019	206000000
2020	23000000