Year	Number of
1990	366.29
1991	372.89
1992	374.69
1993	372.93
1994	371.59
1995	370.73
1996	360.54
1997	352.94
1998	349.92
1999	342.87
2000	341.72
2001	340.46
2002	344.88
2003	352.35
2004	356.86
2005	362.78
2006	366.37
2007	368.44
2008	368.66
2009	367.72
2010	369.41
2011	372.18
2012	376.05
2013	382.18
2014	392.18
2015	392.85
2016	393.56