Year	current US$
1977	957514.222609759
1978	4681591.23411989
1979	8193305.37248399
1980	10078427.8750235
1981	17389994.7978709
1982	27454254.3462688
1983	33483603.2227833
1984	23734088.666705
1985	24814565.5614864
1986	28337417.94811269
1987	19632148.48376824
1988	22712179.553890407
1989	25014592.775534112
1990	33677211.153102964
1991	30421519.43050529
1992	30905978.96867359
1993	35899442.40692477
1994	41373006.74678692
1995	59568138.44552395
1996	70373250.8281727
1997	81618717.1323292
1998	79978173.8917138
1999	99686936.663342
2000	102833889.40855123
2001	122553118.8031624
2002	146109559.56662345
2003	191496516.0505317
2004	224355881.43788588
2005	260569517.5924721
2006	365457487.37122303
2007	473432631.307933
2008	580705785.8868629
2009	468181712.70126104
2010	487193844.0954003
2011	569299636.4591309
2012	570310883.1228209
2013	622640750.3898399
2014	604267275.7813759
2015	480768627.8382709
2016	540330397.6218176
2017	581774676.472283
2018	661095943.5893292
2019	710906604.8045855
2020	268976178.2019063
2021	253593285.2646988
2022	545917291.7650943
2023	671414300.044492