Year	Number of
1990	862.53
1991	898.36
1992	935.11
1993	967.76
1994	1003.95
1995	1045.13
1996	1011.79
1997	982.75
1998	956.07
1999	932.83
2000	910.22
2001	931.86
2002	955.55
2003	980.45
2004	1005.12
2005	1031.73
2006	1040.55
2007	1049.36
2008	1057.3
2009	1065.49
2010	1074.15
2011	1047.56
2012	1022.66
2013	998.77
2014	981.19
2015	965
2016	950.41