Year	Number of
1990	800.87
1991	808.29
1992	822.31
1993	831.55
1994	831.24
1995	826.72
1996	810.91
1997	803.78
1998	785.19
1999	772.3
2000	756.04
2001	743.87
2002	751.82
2003	753.75
2004	767.51
2005	785.59
2006	796.03
2007	821.89
2008	842.38
2009	864.52
2010	888.66
2011	910.75
2012	932.98
2013	956.14
2014	980.65
2015	1006.46
2016	1029.42