Year	Number of
1990	4026.14
1991	4079.51
1992	4187.87
1993	4292.7
1994	4367.87
1995	4425.75
1996	4275.54
1997	4046.37
1998	3825.6
1999	3630.65
2000	3473.75
2001	3407.11
2002	3368.75
2003	3365.11
2004	3396.8
2005	3415.27
2006	3353.39
2007	3249.19
2008	3040.45
2009	2892.95
2010	2786.13
2011	2731.43
2012	2679.68
2013	2591.55
2014	2476.75
2015	2435.66
2016	2537.4