Year	Number of
1990	557.76
1991	589.43
1992	624.01
1993	659.13
1994	696.49
1995	737.06
1996	723.49
1997	707.13
1998	682.56
1999	641.02
2000	661.34
2001	682.01
2002	706.83
2003	732.23
2004	753.46
2005	775.52
2006	800.31
2007	826.04
2008	857.32
2009	888.56
2010	922.79
2011	956.62
2012	983.01
2013	1005.85
2014	1030.1
2015	1061.18
2016	1092.06