Year	Number of
1990	1150.15
1991	1190.5
1992	1277.89
1993	1374.72
1994	1441.33
1995	1474.93
1996	1505.52
1997	1525.18
1998	1531.8
1999	1554.13
2000	1556.46
2001	1571.64
2002	1604.05
2003	1638.13
2004	1650.5
2005	1655.22
2006	1622.91
2007	1613.5
2008	1660.2
2009	1751.93
2010	1814.42
2011	1829.91
2012	1830.32
2013	1802.03
2014	1769.58
2015	1832.36
2016	1896.36