Year	Number
1985	1063179
1986	848616
1987	641556
1988	501379
1989	346696
1990	207581
1991	144204
1992	255484
1993	378433
1994	504069
1995	388677
1996	530103
1997	431857
1998	335182
1999	239419
2000	276027
2001	263485
2002	354153
2003	325388
2004	300866
2005	140669
2006	178135
2007	52762
2008	61142
2009	289219
2010	316389
2011	539298
2012	318147
2013	290391
2014	299423
2015	218900
2016	37316
2017	67277
2018	35204