Year	Number of
1990	2641.59
1991	2647.4
1992	2799.56
1993	2894.78
1994	3004.95
1995	3285.42
1996	3368.02
1997	3408.06
1998	3385.65
1999	3460.71
2000	3668.99
2001	3616.28
2002	3641.39
2003	3682.25
2004	3700.86
2005	3770.06
2006	3776.92
2007	3849.01
2008	3911.92
2009	3910.3
2010	4019.72
2011	4034.73
2012	4136.17
2013	4268.44
2014	4417.65
2015	4683.2
2016	4765.57