Year	Number of
1990	1017.4
1991	1050.78
1992	1085.12
1993	1184.28
1994	1240.1
1995	1135.59
1996	986.1
1997	937.92
1998	973.14
1999	931.16
2000	909.4
2001	963.13
2002	967.9
2003	949.84
2004	975.25
2005	1035.34
2006	1072.01
2007	1069.67
2008	1028.92
2009	987.61
2010	971.78
2011	943.03
2012	945.24
2013	919.89
2014	893.12
2015	880.71
2016	877.23