Year	Number of
1990	776.46
1991	740.32
1992	752.04
1993	767.91
1994	784.7
1995	830.53
1996	844.16
1997	865.69
1998	960.38
1999	1065.47
2000	1168.33
2001	1279.52
2002	1424.29
2003	1523.17
2004	1681.23
2005	1625.57
2006	1611.49
2007	1579.31
2008	1598.55
2009	1637.25
2010	1607.54
2011	1571.49
2012	1550.02
2013	1534.47
2014	1601.03
2015	1610.88
2016	1632.18