Year	Number of
1990	564.77
1991	584.16
1992	606.96
1993	631.78
1994	656.8
1995	681.77
1996	700.55
1997	716.32
1998	731.39
1999	746
2000	762.89
2001	784.06
2002	810.26
2003	835.04
2004	864.23
2005	895.79
2006	915.21
2007	935.14
2008	958.2
2009	981.39
2010	1006.29
2011	1028.93
2012	1055.82
2013	1083.71
2014	1113.2
2015	1144.69
2016	1179.35