Year	Number of
1990	855.49
1991	887.64
1992	923.28
1993	961.71
1994	1003.81
1995	1049.47
1996	991.95
1997	938.58
1998	890.46
1999	847.96
2000	811.08
2001	823.26
2002	838.18
2003	856.79
2004	876.88
2005	898.17
2006	914.31
2007	929.98
2008	945.52
2009	962.89
2010	983.74
2011	985.07
2012	989.86
2013	995.91
2014	1002.81
2015	1010.17
2016	1017.32