Year	Number of
1990	8209.34
1991	7819.77
1992	7819.86
1993	7632.63
1994	7459.52
1995	7410.11
1996	7056.18
1997	6815.61
1998	6542.69
1999	6258.29
2000	6211.26
2001	6071.43
2002	6020.01
2003	5938.84
2004	5877.9
2005	5909.63
2006	5864.87
2007	5858.41
2008	5911.09
2009	5930.35
2010	6054.87
2011	6026.93
2012	6115.5
2013	6196.31
2014	6285.49
2015	6381.24
2016	6482.82