Year	Number of
1990	532.46
1991	548.67
1992	570.56
1993	590.41
1994	619.39
1995	636.89
1996	650.83
1997	668.33
1998	678.28
1999	674.31
2000	671.61
2001	674.02
2002	678.61
2003	683.56
2004	699.77
2005	712.83
2006	723.47
2007	731.81
2008	742.75
2009	752.82
2010	765.44
2011	781.99
2012	802.24
2013	825.9
2014	848.11
2015	873.86
2016	900.83