Year	Number of
1990	1430.44
1991	1492.93
1992	1561.3
1993	1607.35
1994	1655.3
1995	1688.86
1996	1719.97
1997	1767.62
1998	1804.2
1999	1832.6
2000	1879.26
2001	1910.8
2002	1973
2003	2042.42
2004	2122.35
2005	2191.14
2006	2265.35
2007	2333.15
2008	2403.31
2009	2477.54
2010	2570.27
2011	2643.17
2012	2731.22
2013	2810.67
2014	2885.91
2015	2966.86
2016	3068.06