Year	current US$
1977	3656764.43910782
1978	4619620.7123686
1979	5479122.69936898
1980	7469835.03406901
1981	17168204.5949694
1982	12618938.7010218
1983	12203247.9687084
1984	10452659.9479279
1985	8598555.81225049
1986	12337650.859536711
1987	15947653.49187548
1988	14327123.87692092
1989	23327195.568840362
1990	24128770.93110701
1991	17258629.94515111
1992	22900254.95858302
1993	25104381.71217989
1994	29871231.008761723
1995	54540379.944483064
1996	63968230.77767514
1997	67038457.410653554
1998	88347765.72735822
1999	117068121.68421866
2000	100801429.37033477
2001	118077827.12962507
2002	138742060.14415863
2003	187979016.20124564
2004	197015012.2279687
2005	207070700.41477278
2006	250914731.2632638
2007	291989182.92810994
2008	356609070.63312703
2009	312163820.7350394
2010	297398168.89367926
2011	325916970.9288482
2012	359131439.9937136
2013	337768603.66372925
2014	361250293.4154584
2015	270566506.1537746
2016	300658316.3556726
2017	318458121.48194104
2018	358437474.943291
2019	341642436.4599226
2020	204920566.028572
2021	209081386.3746956
2022	233649930.1188833
2023	259308546.6775293