Year	current US$
1987	600000.023841858
1988	899999.976158142
1989	4440000.05722046
1990	16270000.4577637
1991	9989999.77111816
1992	10550000.1907349
1993	16549999.2370605
1994	4389999.8664856
1995	16530000.6866455
1996	16690000.534057599
1997	7230000.01907349
1998	10699999.8092651
1999	7949999.80926514
2000	23520000.4577637
2001	11649999.6185303
2002	33529998.779296905
2003	22579999.9237061
2004	32479999.5422363
2005	29350000.3814697
2006	33560001.373291
2007	53750000
2008	78459999.0844727
2009	68800003.0517578
2010	43909999.8474121
2011	41279998.779296905
2012	17870000.8392334
2013	19309999.4659424
2014	11430000.3051758
2015	11470000.2670288
2016	9300000.19073486
2017	13659999.8474121
2018	15029999.7329712
2019	13699999.8092651
2020	14840000.1525879
2021	15819999.6948242
2022	15989999.7711182