Year	current US$
1990	32997694.9657318
1991	33939069.5909295
1992	37597375.2341286
1993	37185289.7990066
1994	34975465.7692377
1995	32207720.892236
1996	26612210.304883
1997	29085112.1364381
1998	26684039.6497801
1999	20861026.6836745
2000	23239030.1578409
2001	26773056.9093795
2002	33973963.29731
2003	43116478.9311481
2004	45729615.5385242
2005	48626131.8180665
2006	57513542.044541
2007	68735514.4779914
2008	99427716.7869258
2009	102430086.563271
2010	112029935.387306
2011	140783613.344351
2012	170437722.807176
2013	195733560.549075
2014	221548020.056778
2015	187992040.239718
2016	189370730.989722
2017	193844140.432547
2018	204991969.247551
2019	223080037.946566