Year	Number of
1990	9575.36
1991	9917.69
1992	10227.86
1993	10181.89
1994	10301.06
1995	10647.47
1996	10188.11
1997	9423.81
1998	8641.01
1999	8726.68
2000	8713.68
2001	8397.81
2002	8140.24
2003	7963.69
2004	7901.03
2005	7860.01
2006	7319.69
2007	7348.58
2008	7176.25
2009	6300.98
2010	5902.82
2011	5630.54
2012	5739.02
2013	5679.68
2014	5462.06
2015	5552.87
2016	5673.63