Year	U.S. dollars (Billions)
1980	57.010
1981	52.605
1982	54.878
1983	49.603
1984	48.329
1985	47.936
1986	56.421
1987	65.682
1988	76.447
1989	79.250
1990	97.963
1991	105.633
1992	116.466
1993	109.022
1994	116.678
1995	136.941
1996	145.872
1997	143.327
1998	144.644
1999	149.412
2000	132.198
2001	136.310
2002	154.455
2003	202.319
2004	240.854
2005	248.012
2006	273.561
2007	318.940
2008	355.870
2009	330.949
2010	297.368
2011	282.946
2012	242.183
2013	238.911
2014	235.519
2015	195.703
2016	193.095
2017	199.774
2018	212.146
2019	205.275
2020	188.329
2021	214.811
2022	217.753
2023	238.275
2024	250.276
2025	260.452
2026	270.034
2027	278.721
2028	287.758
2029	297.028