Year	current US$
1995	6341000000
1996	7482000000
1997	6988000000
1998	3470000000
1999	4881000000
2000	7132000000
2001	7617000000
2002	10465000000
2003	10103000000
2004	12350000000
2005	15406000000
2006	18809000000
2007	21957000000
2008	19056000000
2009	15035000000
2010	18766000000
2011	19920000000
2012	20645000000
2013	21648000000
2014	23192000000
2015	25270000000
2016	27243000000
2017	31691000000
2018	35133000000
2019	32739000000
2020	16157000000