Year	Number of
1990	1060.32
1991	1147.14
1992	1123.36
1993	1121.37
1994	1125.46
1995	1146.41
1996	1078.29
1997	1024.23
1998	978.37
1999	957.08
2000	952.32
2001	911.29
2002	936.37
2003	960.72
2004	998.72
2005	1065.66
2006	1058.95
2007	1069.85
2008	1085.31
2009	1104.22
2010	1125.39
2011	1162.21
2012	1205.68
2013	1251.95
2014	1300.08
2015	1360.73
2016	1416.99