Year	Number of
1990	5322.52
1991	5457.94
1992	5597.6
1993	5744.62
1994	5905.66
1995	6082.85
1996	6163.29
1997	6251.29
1998	6349.39
1999	6453.18
2000	6566.49
2001	6698.09
2002	6807.67
2003	6911.22
2004	7021.88
2005	7140.06
2006	7253.15
2007	7370.53
2008	7485.06
2009	7599.28
2010	7722.96
2011	7794.71
2012	7870.16
2013	7937.33
2014	8010.63
2015	8096.35
2016	8183.6