Year	current US$
1995	56000000
1996	52000000
1997	65000000
1998	59000000
1999	57000000
2000	73000000
2001	75000000
2002	95000000
2003	99000000
2004	113000000
2005	141000000
2006	190000000
2007	233000000
2008	288000000
2009	243000000
2010	241000000
2011	277000000
2012	308000000
2013	335000000
2014	345000000
2015	284000000
2016	257000000
2017	302000000
2018	352000000
2019	386000000
2020	276000000