Year	Number of
1990	1657.36
1991	1690.38
1992	1723.74
1993	1777.96
1994	1787.27
1995	1786.32
1996	1747.85
1997	1711.32
1998	1683.46
1999	1648.03
2000	1567.19
2001	1539.54
2002	1506.04
2003	1438.6
2004	1417.36
2005	1377.82
2006	1310.14
2007	1234.34
2008	1200.64
2009	1204.96
2010	1179.65
2011	1155.8
2012	1060.8
2013	1018.71
2014	961.14
2015	956.75
2016	955.19