Year	Number of
1990	783.65
1991	801.29
1992	846.19
1993	836.68
1994	877.81
1995	877.32
1996	946.5
1997	1077.47
1998	1116.65
1999	1169.56
2000	1234.51
2001	1235.19
2002	1261.64
2003	1301.07
2004	1343.1
2005	1396.43
2006	1457.19
2007	1485.96
2008	1508.95
2009	1549.48
2010	1591.97
2011	1610.08
2012	1588.03
2013	1578.33
2014	1594.08
2015	1598.82
2016	1604.13