Year	current US$
1995	186000000
1996	188000000
1997	144000000
1998	269000000
1999	251000000
2000	193000000
2001	194000000
2002	248000000
2003	255000000
2004	341000000
2005	370000000
2006	349000000
2007	376000000
2008	468000000
2009	456000000
2010	601000000
2011	527000000
2012	529000000
2013	471000000
2014	608000000
2015	685000000
2016	474000000
2017	580000000
2018	498000000
2019	638000000
2020	234000000