Year	current US$
1995	20699000000
1996	22049000000
1999	31630000000
2000	29016000000
2001	28781000000
2002	30270000000
2003	35807000000
2004	36362000000
2005	38633000000
2006	39319000000
2007	46042000000
2008	50373000000
2009	45087000000
2010	46695000000
2011	55509000000
2012	50068000000
2013	52444000000
2014	58464000000
2015	47713000000
2016	49029000000
2017	53787000000
2018	59131000000
2019	59751000000
2020	31193000000