Year	Number of
1990	4669.64
1991	4793.79
1992	4910
1993	5001.48
1994	5077.86
1995	5172.36
1996	5264.25
1997	5340.03
1998	5435.22
1999	5521.8
2000	5569.62
2001	5573.26
2002	5576.54
2003	5671.94
2004	5759.62
2005	5818.86
2006	5776.77
2007	5761.39
2008	5819.86
2009	5789.84
2010	5756.47
2011	5816
2012	5835.25
2013	5788.84
2014	5781.77
2015	5763.12
2016	5765.25