Year	current US$
1977	8460556.65905892
1978	10505773.4083799
1979	23652459.215601962
1980	36578477.796555504
1981	26744923.552211598
1982	22120849.76491515
1983	17079236.636271857
1984	22789298.5953886
1985	17961735.61404839
1986	14584766.055539493
1987	25503396.1199999
1988	14682868.193013795
1989	13368385.3124424
1990	45228712.135802194
1991	50745542.6296438
1992	35857629.0665813
1993	44945482.8054265
1994	85958559.27880539
1995	71034527.6571047
1996	46440958.6932144
1997	19724243.682388604
1998	13117398.23921185
1999	17923894.03584427
2000	39051012.72629505
2001	46683838.322385885
2002	38335972.3408979
2003	66063278.4254882
2004	61469191.7511219
2005	78151172.5525841
2006	40023538.6641275
2007	43355388.07375558
2008	58897678.39308508
2009	100483761.15495427
2010	56480731.10330645
2011	156700172.16640043
2012	175825132.25435278
2013	219037501.0799769
2014	202450352.1258088
2015	198478144.0140747
2016	66548016.13448873
2017	66520419.06359061
2018	66769122.26669389
2019	63702719.3452595
2020	53007926.7209716
2021	67688635.54219
2022	40596660.8018266