Year	Number of
1990	3823.73
1991	3922.21
1992	4073.63
1993	4224.42
1994	4327.03
1995	4434.06
1996	4451.92
1997	4563.97
1998	4650.46
1999	4638.87
2000	4606.54
2001	4615.92
2002	4745.5
2003	4845.92
2004	4836.71
2005	4973.72
2006	4872.94
2007	4797.43
2008	4963.81
2009	4994.18
2010	5023.17
2011	4990.91
2012	5019.93
2013	5185.54
2014	5232.54
2015	5266.62
2016	5438.25