Year	constant 2015 US$
1980	2768.683306844325
1981	2554.4329609481274
1982	2464.3012951838127
1983	2476.5808237527694
1984	2532.1002918387912
1985	2527.9609392709785
1986	2510.148559293169
1987	2524.3188343028073
1988	2590.3291364180213
1989	2505.4981219835468
1990	2339.473561083799
1991	2285.373193372462
1992	2083.156662975203
1993	1534.263137531544
1994	1505.8697410113057
1995	1675.7080906755932
1996	1840.3540823383237
1997	1909.4689367870476
1998	1934.5579476363018
1999	1913.99891888388
2000	1909.5020620136015
2001	1925.508030012379
2002	2116.851679056431
2003	2106.9858642864187
2004	2257.1523599598268
2005	2505.6550291172307
2006	2696.441095509348
2007	2964.3354495742224
2008	3176.6721617809676
2009	3087.8114295891146
2010	3105.4496550974477
2011	3094.733914889445
2012	3235.174604300407
2013	3270.9663449721384
2014	3304.681147528657
2015	3217.339240054168
2016	3023.916319000095
2017	2914.127139252357
2018	2777.8430416823535
2019	2666.2539154836745
2020	2435.02485427339
2021	2387.429907017174
2022	2385.119955662447
2023	2333.718775061359