Year	Number of
1990	4842.34
1991	5013.37
1992	5084.97
1993	5139.88
1994	5062.73
1995	5015.15
1996	4562.32
1997	4185.2
1998	3842.74
1999	3677.32
2000	3502.87
2001	3345.33
2002	3240.92
2003	3165.84
2004	3133
2005	3081.03
2006	2991.37
2007	3045.66
2008	3089.35
2009	2962.01
2010	2904.1
2011	2902.55
2012	3006.69
2013	3055
2014	3004.79
2015	3073.67
2016	3155.71