Year	current US$
1978	2536263.704
1979	2631835.699
1980	2328187.704
1981	2024539.948
1982	1720892.072
1983	1292364.478
2003	526103.489802291
2004	522143.073196046
2005	742945.863754765
2006	946706.347332912
2007	14640731.874284
2008	3185323.54662973
2009	8412067.91879382
2010	58119088.1989003
2011	91362708.7170283
2012	66136002.2976319
2013	69585194.3599469
2014	25235850.1342668
2015	20477127.0609201
2016	17797429.1852169
2017	18174365.2743062
2018	19006746.070219
2019	18925942.9503629
2020	18308188.5503619
2021	26836811.3443356
2022	21148937.0619008