Year	Number of
1990	615.83
1991	622.63
1992	631.12
1993	641.88
1994	658.96
1995	678.35
1996	698.44
1997	723.19
1998	751.24
1999	782.82
2000	819.78
2001	858.17
2002	890.18
2003	921.65
2004	976.3
2005	1022.99
2006	1061.2
2007	1101.91
2008	1142.8
2009	1169.92
2010	1199.24
2011	1233.69
2012	1270.75
2013	1311.29
2014	1354.59
2015	1399.13
2016	1447.81