Year	Number of
1990	8772.63
1991	8564
1992	8271.88
1993	8080.18
1994	7830.96
1995	7499.61
1996	7475.37
1997	7178.27
1998	7155.26
1999	6990.03
2000	6832.01
2001	6671.31
2002	6510.6
2003	6336.37
2004	6136
2005	6030.67
2006	5915.81
2007	5782.25
2008	5693.23
2009	5628.78
2010	5578.71
2011	5564.52
2012	5538.6
2013	5513.07
2014	5457.19
2015	5500.98
2016	5546.6