Year	current USD
1987	103800000
1988	102900000
1989	101900000
1990	73100000
1991	78600000
1992	78800000
1993	95200000
1994	101000000
1995	96600000
1996	101200000
1997	118000000
1998	104000000
1999	111600000
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0
2022	0