Year	Number of
1990	94.99
1991	96.09
1992	97.94
1993	100.22
1994	102.92
1995	108.19
1996	114
1997	118.55
1998	120.11
1999	119.95
2000	117.74
2001	116.31
2002	116.12
2003	116.74
2004	117.12
2005	117.02
2006	117.44
2007	116.86
2008	117.14
2009	120.34
2010	123.9
2011	125.18
2012	125.9
2013	126.56
2014	126.31
2015	128.58
2016	131.39