Year	constant 2010 US$
1990	10257049777.8666
1991	12786849277.9101
1992	15181267653.8118
1993	16562397634.1132
1994	18122047246.7629
1995	19436573628.6461
1996	21384071264.0888
1997	21438624288.4607
1998	21980215614.1776
1999	21943467671.2756
2000	22386419581.9152
2001	22714201106.5521
2002	22461947286.4807
2003	20164513260.1055
2004	24852427251.5479
2005	26351552853.3259
2006	27231600651.0525
2007	30429739992.8792
2008	32762737577.0997
2009	35330777219.3064
2010	37911136605.3731
2011	38550033924.9803
2012	39645489215.684
2013	40681524242.143
2014	41137784999.3422
2015	41356143957.4779
2016	41734874786.1846
2017	42683288110.9292
2018	41077564650.3047