Year	Number of
1990	1931.37
1991	2002.76
1992	2087.65
1993	2152.06
1994	2220.81
1995	2289.48
1996	2365.37
1997	2455.94
1998	2613.69
1999	2933.2
2000	3248.29
2001	3532.65
2002	3795.96
2003	4044.69
2004	4137.08
2005	4275.29
2006	4448.22
2007	4557.41
2008	4637.64
2009	4741.03
2010	4860.4
2011	4946.92
2012	5019.08
2013	5108.57
2014	5196.91
2015	5253.61
2016	5297.33