Year	Number of
1990	778.93
1991	794.05
1992	821.23
1993	863.12
1994	914.29
1995	965.39
1996	1000.33
1997	1013.37
1998	1024.27
1999	1037.28
2000	1042.65
2001	1036.73
2002	1032.72
2003	1021.83
2004	1004.28
2005	979.77
2006	950.6
2007	928.36
2008	911.66
2009	908.38
2010	906.95
2011	895.05
2012	883.8
2013	861.62
2014	857.72
2015	836.23
2016	820.66