Year	Number of
1990	1430.56
1991	1468.57
1992	1509.63
1993	1553.47
1994	1600.54
1995	1652.81
1996	1696.01
1997	1746.04
1998	1801.33
1999	1858.41
2000	1917.74
2001	1964.24
2002	2009.7
2003	2056.46
2004	2106.99
2005	2165.19
2006	2216.31
2007	2271.68
2008	2336.57
2009	2405.12
2010	2479.06
2011	2537.8
2012	2603.55
2013	2674.47
2014	2751.44
2015	2834.91
2016	2918.84