Year	Number of
1990	218.45
1991	210.18
1992	218.85
1993	206.37
1994	193
1995	199.03
1996	204.6
1997	201.1
1998	205.09
1999	192.64
2000	185.42
2001	188.13
2002	176.8
2003	184.67
2004	185.5
2005	194.09
2006	198.06
2007	192.98
2008	197.81
2009	196.22
2010	198.06
2011	194.6
2012	192.46
2013	187.9
2014	183.44
2015	190.3
2016	185.62