Year	current US$
1976	5490665.587099
1977	8020500
1978	13978000
1979	10463000
1980	12675500
1981	10334500
1982	9837496.64180636
1983	9305511.47698691
1984	6072200.27825425
1985	14812996.7294923
1986	26897012.7342972
1987	36414762.3033381
1988	51657192.8785779
1989	59880053.3550609
1990	69781501.8992474
1991	53016557.6678253
1992	52942515.7781842
1993	38746495.1016734
1994	34521492.1816793
1995	37608482.6699034
1996	58401982.7843742
1997	59415503.2472151
1998	44084978.8045731
1999	71305511.291037
2000	122898988.202728
2001	112041498.811027
2002	114506518.223208
2003	84684001.2302939
2004	48253483.7920367
2005	71357473.8645495
2006	113721680.976537
2007	108512535.020953
2008	166162897.20763
2009	213683331.633225
2010	217999757.441087
2011	237114250.351976
2012	288924768.784865
2013	402752296.213006
2014	486876774.541703
2015	437151657.938585
2016	376735092.705476
2017	312140148.194318
2018	294468435.057294
2019	277578761.136722
2020	348090076.01987
2021	420102782.499484
2022	482145605.528777
2023	473729034.128496