Year	Number of
1990	1034.11
1991	1023.29
1992	962.62
1993	897.43
1994	807.09
1995	720.32
1996	693.34
1997	707.15
1998	711
1999	723.13
2000	732.72
2001	740.14
2002	761.46
2003	806.06
2004	836.94
2005	841.81
2006	848.01
2007	849.82
2008	914.56
2009	971.12
2010	1025.21
2011	1076.89
2012	1123.49
2013	1099.92
2014	1104.55
2015	1062.85
2016	1050.27