Year	U.S. dollars (Billions)
1980	5.194
1981	5.404
1982	5.834
1983	6.298
1984	7.382
1985	7.302
1986	7.826
1987	8.149
1988	8.518
1989	8.550
1990	9.787
1991	10.716
1992	11.553
1993	12.351
1994	14.245
1995	15.127
1996	16.592
1997	18.544
1998	19.050
1999	19.143
2000	20.007
2001	19.236
2002	20.238
2003	22.352
2004	24.423
2005	28.880
2006	33.447
2007	38.270
2008	48.177
2009	49.750
2010	58.643
2011	67.725
2012	70.392
2013	76.934
2014	82.483
2015	85.091
2016	88.000
2017	94.376
2018	94.484
2019	89.015
2020	84.441
2021	88.548
2022	74.846