Year	U.S. dollars (Billions)
1980	69.841
1981	78.367
1982	79.998
1983	79.672
1984	57.826
1985	59.865
1986	60.877
1987	46.854
1988	60.378
1989	44.672
1990	48.391
1991	53.382
1992	60.400
1993	59.865
1994	58.357
1995	77.427
1996	70.536
1997	85.684
1998	91.836
1999	97.517
2000	117.596
2001	123.119
2002	95.258
2003	83.684
2004	112.254
2005	143.375
2006	178.521
2007	232.857
2008	306.764
2009	268.624
2010	318.281
2011	316.482
2012	372.592
2013	258.931
2014	214.690
2015	125.449
2016	112.915
2017	115.883
2018	102.021
2019	73.003
2020	43.788
2021	57.666
2022	92.104
2023	97.116
2024	102.328
2025	105.876