Year	current US$
1995	5646000000
1996	5572000000
1997	5415000000
1998	6390000000
1999	6047000000
2000	6029000000
2001	6264000000
2002	6643000000
2003	7687000000
2004	8902000000
2005	9038000000
2006	10487000000
2007	12945000000
2008	14081000000
2009	12357000000
2010	12984000000
2011	14911000000
2012	14578000000
2013	16080000000
2014	17577000000
2015	16007000000
2016	17347000000
2017	21586000000
2018	24366000000
2019	24592000000
2020	10522000000