Year	Number of
1990	91.12
1991	95.57
1992	100.3
1993	104.89
1994	109.21
1995	113.71
1996	109.4
1997	104.74
1998	100.5
1999	96.74
2000	93.21
2001	90.19
2002	87.72
2003	86.04
2004	84.45
2005	83.05
2006	83.39
2007	83.68
2008	84.66
2009	86.09
2010	88.04
2011	89.72
2012	91.52
2013	94.04
2014	96.65
2015	100
2016	103.65