Year	Number of
1990	968.14
1991	1003.39
1992	1014.71
1993	1026
1994	1046.55
1995	1043.9
1996	1049.9
1997	1031.4
1998	1005.38
1999	972.13
2000	930.51
2001	893.91
2002	844.53
2003	806.73
2004	765.29
2005	730.02
2006	707.4
2007	685.4
2008	654.82
2009	634.77
2010	624.29
2011	605.88
2012	599.35
2013	593.43
2014	595.58
2015	598.89
2016	643.48