Year	Number of
1990	908.93
1991	902.72
1992	904.73
1993	903.23
1994	906.75
1995	902.88
1996	899.1
1997	893.86
1998	886.58
1999	883.55
2000	880.2
2001	883.62
2002	896.14
2003	901.24
2004	914.36
2005	918.4
2006	944.68
2007	972.54
2008	1026.6
2009	1050.8
2010	1083.52
2011	1105.09
2012	1115.67
2013	1124.18
2014	1132.52
2015	1155.2
2016	1186.96