Year	current US$
1995	175000000
1996	186000000
1997	201000000
1998	261000000
1999	260000000
2000	227000000
2001	271000000
2002	217000000
2003	223000000
2004	224000000
2005	244000000
2006	277000000
2007	329000000
2008	383000000
2009	378000000
2010	438000000
2011	540000000
2012	676000000
2013	778000000
2014	820000000
2015	712000000
2016	644000000
2017	572000000
2018	604000000
2019	706000000
2020	282000000