Year	Number of
1990	834.33
1991	829.83
1992	827.28
1993	859.4
1994	903.85
1995	949.2
1996	973
1997	981.37
1998	1017.49
1999	1037.27
2000	1061.23
2001	1085.58
2002	1112.29
2003	1141.79
2004	1177.89
2005	1209.32
2006	1217.03
2007	1224.12
2008	1241.36
2009	1295.92
2010	1343.84
2011	1376.89
2012	1413.86
2013	1436.14
2014	1447.47
2015	1465.23
2016	1496.49