Year	current US$
1995	78000000
1996	93000000
1997	95000000
1998	99000000
1999	101000000
2000	111000000
2001	111000000
2002	121000000
2003	150000000
2004	168000000
2005	214000000
2006	260000000
2007	289000000
2008	278000000
2009	256000000
2010	264000000
2011	248000000
2012	298000000
2013	351000000
2014	380000000
2015	372000000
2016	391000000
2017	427000000
2018	479000000
2019	527000000
2020	247000000