Year	Number of
1990	1672.46
1991	1791.36
1992	1920.89
1993	2012.86
1994	2108.72
1995	2207.22
1996	2294.24
1997	2390.69
1998	2443.48
1999	2637.23
2000	2823.77
2001	2978.2
2002	3116.75
2003	3265.16
2004	3464.28
2005	3705.69
2006	3741.1
2007	3792.35
2008	3810.85
2009	3821
2010	3837.63
2011	3887.35
2012	3991.04
2013	4136.62
2014	4260.52
2015	4451.89
2016	4647.15