Year	Number of
1990	4939.25
1991	4951.38
1992	4808.87
1993	4604.51
1994	4541.29
1995	4537.97
1996	4354.47
1997	4321.81
1998	4256.62
1999	4351.55
2000	4188.5
2001	4113.55
2002	4064.86
2003	4068.46
2004	4104.99
2005	4091.48
2006	4099.22
2007	4121.13
2008	4108.93
2009	4076.76
2010	4062.26
2011	4016.34
2012	4027.02
2013	3984.2
2014	3859.86
2015	3840.02
2016	3829.16