Year	Number of
1990	644.38
1991	648.75
1992	667.77
1993	688.55
1994	712.23
1995	752.21
1996	789.55
1997	796.8
1998	811.06
1999	802.97
2000	812.68
2001	821.33
2002	846.49
2003	861.89
2004	865.95
2005	869.2
2006	882.1
2007	888.24
2008	897.09
2009	905.21
2010	912.7
2011	922.86
2012	929.74
2013	930.81
2014	934.36
2015	953.64
2016	971.09