Year	Number of
1990	204.68
1991	212.05
1992	225.73
1993	240.77
1994	255.2
1995	274.37
1996	279.4
1997	278.85
1998	286.61
1999	291.23
2000	299.13
2001	302.83
2002	303.5
2003	306.23
2004	315.07
2005	313.89
2006	320.11
2007	320.65
2008	326.87
2009	333.69
2010	342.32
2011	352.08
2012	362.39
2013	368.08
2014	372.97
2015	376.65
2016	382.33