Year	Number of
1990	454.31
1991	439.53
1992	412.46
1993	379.52
1994	386.27
1995	376.31
1996	367.54
1997	361.42
1998	356.62
1999	361.48
2000	366.81
2001	375.32
2002	381.12
2003	387.33
2004	390.49
2005	393.46
2006	380.75
2007	370.27
2008	365.88
2009	368.4
2010	382.41
2011	403.29
2012	388.56
2013	376.12
2014	378.94
2015	385.93
2016	391.73