Year	Number of
1990	355.31
1991	361.35
1992	369.08
1993	376.58
1994	384.2
1995	391.77
1996	397.13
1997	398.84
1998	402.23
1999	407.74
2000	414.67
2001	420.65
2002	427.19
2003	436.2
2004	445.84
2005	457.13
2006	472.25
2007	488.88
2008	507.79
2009	527.73
2010	552.05
2011	581.05
2012	613.26
2013	649.62
2014	688.36
2015	730.79
2016	773.67