Year	current US$
1995	10497000000
1996	11461000000
1997	12678000000
1998	13474000000
1999	13134000000
2000	12502000000
2001	12317000000
2002	12418000000
2003	11447000000
2004	13270000000
2005	13305000000
2006	14044000000
2007	15042000000
2008	16095000000
2009	15547000000
2010	17357000000
2011	19022000000
2012	20077000000
2013	21215000000
2014	22011000000
2015	23059000000
2016	24141000000
2017	25388000000
2018	26498000000