Year	Number of
1990	588.19
1991	618.47
1992	648.49
1993	678.68
1994	710.62
1995	745.34
1996	768.98
1997	793.74
1998	818.67
1999	844.96
2000	873.15
2001	901.55
2002	930.69
2003	960.85
2004	991.8
2005	1023.96
2006	1053.81
2007	1082.81
2008	1113.53
2009	1145.09
2010	1178.29
2011	1214.21
2012	1250.46
2013	1287.61
2014	1324.13
2015	1360.4
2016	1401.51