Year	constant 2010 US$
1991	15331365586.756
1992	12210120927.1719
1993	16159689088.9782
1994	19357531478.4016
1995	19603192624.4625
1996	20632944671.5264
1997	23014586736.9846
1998	27288773348.4549
1999	27703410654.1419
2000	29511206912.753
2001	28308336471.0879
2002	29570019226.1544
2003	29827541805.2121
2004	34193522049.5886
2005	33422989763.5983
2006	34087515246.1598
2007	33844030869.9851
2008	34044595788.2925
2009	25883454174.1573
2010	27048356730.3723
2011	26104641895.0599
2012	24312837640.2319
2013	25707262188.6484
2014	28894599118.1927
2015	28508802241.6273
2016	26964839046.3786
2017	31570810155.1297
2018	36995668655.288