Year	current US$
1995	9478000000
1996	9798000000
1997	8944000000
1998	8754000000
1999	7646000000
2000	7837000000
2001	7540000000
2002	7633000000
2003	9148000000
2004	10518000000
2005	11218000000
2006	11822000000
2007	12984000000
2008	14083000000
2009	13799000000
2010	14332000000
2011	17538000000
2012	18884000000
2013	19963000000
2014	20853000000
2015	19675000000
2016	19941000000
2017	21501000000
2018	21441000000
2019	21097000000
2020	10372000000