Year	Number of
1990	184.47
1991	193.54
1992	205.21
1993	217.92
1994	228.6
1995	228.43
1996	239.28
1997	240.39
1998	245.37
1999	245.1
2000	250.62
2001	258.34
2002	263
2003	265.03
2004	262.69
2005	262.9
2006	271.22
2007	277.03
2008	284.27
2009	286.8
2010	286.71
2011	288.6
2012	284.45
2013	290.47
2014	297.91
2015	298.26
2016	300.58