Year	U.S. dollars (Billions)
1980	53.714
1981	52.620
1982	53.111
1983	51.056
1984	53.032
1985	56.223
1986	73.652
1987	91.775
1988	109.255
1989	119.106
1990	141.718
1991	128.194
1992	113.134
1993	89.279
1994	103.739
1995	134.339
1996	132.183
1997	127.076
1998	134.212
1999	135.398
2000	126.075
2001	129.534
2002	140.305
2003	171.609
2004	197.390
2005	204.999
2006	217.101
2007	256.408
2008	285.685
2009	253.222
2010	249.628
2011	275.556
2012	258.454
2013	271.366
2014	274.934
2015	234.558
2016	240.705
2017	255.558
2018	275.833
2019	268.545
2020	271.668
2021	296.668
2022	282.109
2023	300.499
2024	308.055
2025	318.583
2026	329.774
2027	341.682
2028	353.842
2029	365.673