Year	current US$
1995	28717000000
1996	30015000000
1997	29714000000
1998	29814000000
1999	28349000000
2000	27498000000
2001	25829000000
2002	26893000000
2003	31277000000
2004	35398000000
2005	35310000000
2006	38276000000
2007	42650000000
2008	46217000000
2009	40407000000
2010	38432000000
2011	43271000000
2012	40943000000
2013	43825000000
2014	45562000000
2015	39433000000
2016	40381000000
2017	44580000000
2018	49066000000
2019	49521000000
2020	20036000000