Year	Number of
1990	1556.88
1991	1549.64
1992	1654.74
1993	1760.2
1994	1812.61
1995	1925.54
1996	1978.88
1997	1989.82
1998	2069.7
1999	2117.55
2000	2147.26
2001	2165.22
2002	2195.82
2003	2248.17
2004	2275.7
2005	2326.3
2006	2392.74
2007	2430.53
2008	2483
2009	2523.09
2010	2559.72
2011	2586.69
2012	2609.32
2013	2623.33
2014	2633.06
2015	2661.52
2016	2695.12