Year	Number of
1990	336.99
1991	348.83
1992	365.55
1993	378.61
1994	388.44
1995	387.29
1996	385.04
1997	386.95
1998	398.27
1999	392.85
2000	389.59
2001	387.91
2002	388.52
2003	389.08
2004	381.47
2005	387.15
2006	387.52
2007	387.67
2008	388.54
2009	387.18
2010	383.61
2011	383.91
2012	380.56
2013	383.95
2014	387.38
2015	399.93
2016	411.11