Year	Number of
1990	855.39
1991	926.95
1992	1005.99
1993	1092.82
1994	1188.87
1995	1295.25
1996	1409.13
1997	1534.27
1998	1672.21
1999	1824.54
2000	1993.26
2001	2112.15
2002	2240.65
2003	2380.05
2004	2529.89
2005	2691.84
2006	2894.84
2007	3112.58
2008	3359.46
2009	3627.38
2010	3917.52
2011	4002.1
2012	4098.74
2013	4198.3
2014	4303
2015	4411.74
2016	4528.49