Year	Number of
1990	1008.77
1991	1022.55
1992	1033.54
1993	1041.13
1994	1046.57
1995	1050.35
1996	1024.33
1997	995.09
1998	964.2
1999	935.18
2000	909.45
2001	860.11
2002	816.98
2003	780.45
2004	745.41
2005	710.99
2006	692.32
2007	672.78
2008	653.78
2009	637.37
2010	624.44
2011	633.14
2012	644.4
2013	655.37
2014	664.42
2015	671.27
2016	677.37