Year	Number of
1990	75.49
1991	80.11
1992	86.35
1993	88.79
1994	92.61
1995	89.22
1996	89.57
1997	82.89
1998	89.12
1999	95.25
2000	97.95
2001	98.56
2002	98.52
2003	96.01
2004	98
2005	96.49
2006	94.4
2007	97.27
2008	99.06
2009	98.99
2010	97.9
2011	96.33
2012	97.41
2013	98.95
2014	96.93
2015	98.31
2016	98.98