Year	Number of
1990	1018.77
1991	990.41
1992	969.53
1993	987.47
1994	1000.09
1995	1005
1996	990.19
1997	968.71
1998	963.62
1999	950.6
2000	932.74
2001	925.83
2002	918.17
2003	918.27
2004	915.16
2005	911.78
2006	898.02
2007	882.56
2008	869.78
2009	884.36
2010	891.9
2011	893.29
2012	895.26
2013	890.58
2014	882.45
2015	891.48
2016	904.28