Year	Number of
1990	1641.53
1991	1766.32
1992	1834.54
1993	1874.62
1994	1899.83
1995	1940.86
1996	2001.67
1997	1991.46
1998	1991.37
1999	2096.09
2000	2161.68
2001	2231.78
2002	2331.51
2003	2296.32
2004	2412.54
2005	2434.25
2006	2541.85
2007	2500.49
2008	2565.66
2009	2648.88
2010	2627.19
2011	2577.56
2012	2616.08
2013	2653.28
2014	2670.29
2015	2714.16
2016	2764