Year	current US$
1992	1000000
1993	59000000
1994	22000000
1995	19000000
1996	28000000
1997	8000000
1998	29950000.762939498
1999	30170000.0762939
2000	24620000.8392334
2001	28079999.9237061
2002	51659999.8474121
2003	40060001.373291
2004	39900001.5258789
2005	40759998.3215332
2006	50319999.6948242
2007	39819999.6948242
2008	63630001.0681152
2009	52479999.5422363
2010	57290000.9155273
2011	64019996.643066406
2012	56020000.4577637
2013	65069999.694824204
2014	49310001.373291
2015	49540000.9155273
2016	45029998.779296905
2017	52360000.6103516
2018	46990001.6784668
2019	47930000.3051758
2020	44840000.1525879
2021	47849998.4741211
2022	43430000.3051758