Year	Number of
1990	464.78
1991	486.12
1992	508.31
1993	533.79
1994	561.87
1995	593.85
1996	629
1997	668.24
1998	718.62
1999	775.38
2000	829.32
2001	894.11
2002	955.44
2003	1026.45
2004	1107.17
2005	1192.81
2006	1263.95
2007	1340.75
2008	1432.07
2009	1523.26
2010	1627.49
2011	1717.57
2012	1806.83
2013	1897.32
2014	2011.19
2015	2124.66
2016	2261.9