Year	Number of
1990	617.6
1991	637.82
1992	657.99
1993	678.04
1994	699.26
1995	722.41
1996	744.41
1997	767.56
1998	791.38
1999	816.68
2000	844.04
2001	863.93
2002	884.83
2003	907.17
2004	930.94
2005	956.63
2006	983.7
2007	1011.01
2008	1043.12
2009	1076.69
2010	1113.82
2011	1150.08
2012	1186.1
2013	1224.91
2014	1265.03
2015	1306.56
2016	1357.49