Year	Number of
1990	3051.84
1991	3122.46
1992	3247.15
1993	3361.99
1994	3517.9
1995	3649.6
1996	3715.16
1997	3805.44
1998	3910.64
1999	3967.19
2000	3989.69
2001	3955.71
2002	3940.41
2003	4018.93
2004	4062.24
2005	4125.6
2006	4157.52
2007	4250.61
2008	4340.67
2009	4456.55
2010	4540.03
2011	4639.85
2012	4760.87
2013	4922.17
2014	5069.19
2015	5209.43
2016	5339.39