Year	current US$
1975	1004.5618093728468
1976	1181.4051077438346
1977	1437.9592107710066
1978	1646.2901596440213
1979	2017.1728029501503
1980	2710.4002795275196
1981	2656.5732324875266
1982	2574.6455937611154
1983	2417.7341243944174
1984	2407.8474702692283
1985	2321.642747183091
1986	2396.6233224608895
1987	2888.9802712753085
1988	3120.7730160537553
1989	3123.739846159058
1990	3608.2625667973557
1991	3742.1647655492548
1992	4064.7180247656356
1993	3955.4576089924217
1994	4138.642679959136
1995	4767.269376048204
1996	4901.528130774799
1997	4872.6595500830235
1998	4908.12873766199
1999	5048.997168131682
2000	5264.053800986659
2001	5211.9277722380775
2002	5609.199932381798
2003	6803.8787403025135
2004	7955.907216940495
2005	8859.0323789405
2006	9748.759107712684
2007	11505.368934343147
2008	12427.549170559347
2009	10627.641376969372
2010	11207.530047967626
2011	12625.376741794851
2012	12403.640555591883
2013	12793.913369027288
2014	13014.859597008499
2015	11597.285610462439
2016	12007.583940341341
2017	13168.30780742358
2018	14244.588387593438
2019	14212.913975924122
2020	12862.534080861336
2021	14917.593398441644
2022	15844.370062719694
2023	16459.966187196947