Year	Number of
1990	299.19
1991	312.57
1992	328.3
1993	335.02
1994	351.58
1995	367.21
1996	370.65
1997	393.86
1998	399.14
1999	409.01
2000	423.12
2001	407.53
2002	388.13
2003	367.16
2004	348.22
2005	326.67
2006	308.53
2007	289.65
2008	305.84
2009	318.94
2010	331.16
2011	337.99
2012	346.72
2013	349.62
2014	352.39
2015	355.51
2016	362.64