Year	Number of
1990	4286.28
1991	4450.11
1992	4500.79
1993	4655.17
1994	4771.52
1995	4852.37
1996	4805.08
1997	4848.95
1998	4742.6
1999	4934.58
2000	4637.95
2001	4529.26
2002	4343.58
2003	4470.16
2004	4260.77
2005	4173.63
2006	4042.61
2007	3737.16
2008	3506.57
2009	3949.34
2010	4016.79
2011	4072.18
2012	4016.69
2013	4196.4
2014	4184.56
2015	4200.23
2016	4256.52