Year	Number of
1990	939.9
1991	931.77
1992	907.78
1993	886.38
1994	868.47
1995	888.71
1996	867.71
1997	867.97
1998	844.62
1999	947.67
2000	952
2001	948.53
2002	924.91
2003	912.79
2004	893.85
2005	880.71
2006	883.26
2007	885.6
2008	880.03
2009	882.47
2010	871.79
2011	884.16
2012	923.57
2013	941.1
2014	948.71
2015	972.13
2016	995.12