Year	Number of
1990	267.11
1991	274.52
1992	282.81
1993	293.48
1994	307.05
1995	322.75
1996	317.08
1997	308.57
1998	300.31
1999	292.03
2000	284.79
2001	286.68
2002	293.1
2003	295.71
2004	295.92
2005	295.65
2006	297.62
2007	297.81
2008	299.93
2009	305.66
2010	313.8
2011	322.82
2012	329.9
2013	336.57
2014	343.62
2015	360.63
2016	380.37