Year	Number
1985	746698
1986	597302
1987	418630
1988	320628
1989	230868
1990	128055
1991	137849
1992	248273
1993	386338
1994	428342
1995	364377
1996	471187
1997	398679
1998	324129
1999	245729
2000	293194
2001	143850
2002	328917
2003	268990
2004	219940
2005	70138
2006	24488
2007	34057
2008	81498
2009	138025
2010	293033
2011	390908
2012	366611
2013	333932
2014	213026
2015	236739
2016	52689
2017	31736
2018	66019