Year	Number of
1990	405.83
1991	430.26
1992	463.66
1993	506.7
1994	553.83
1995	594.04
1996	622.15
1997	644.79
1998	664.32
1999	692.01
2000	724.37
2001	758.78
2002	785.29
2003	811.85
2004	839.65
2005	863.73
2006	883.5
2007	896.55
2008	910.79
2009	920.14
2010	932.77
2011	943.98
2012	956.29
2013	972.87
2014	992.72
2015	1014.74
2016	1041.61