Year	current US$
1995	6947000000
1996	8291000000
1997	8039000000
1998	4027000000
1999	5555000000
2000	7945000000
2001	8349000000
2002	11440000000
2003	11063000000
2004	13507000000
2005	16924000000
2006	20947000000
2007	24431000000
2008	21447000000
2009	16355000000
2010	20788000000
2011	22195000000
2012	22934000000
2013	24459000000
2014	26136000000
2015	27957000000
2016	29817000000
2017	34453000000
2018	38022000000
2019	35339000000
2020	16705000000