Year	Number of
1990	282.59
1991	300.16
1992	319.51
1993	340.25
1994	364.91
1995	394.11
1996	422.96
1997	454.1
1998	488.73
1999	523.58
2000	558.46
2001	569.05
2002	578.57
2003	591.03
2004	604.6
2005	619.84
2006	644.8
2007	671.65
2008	700.13
2009	729.93
2010	761.33
2011	794.46
2012	830.32
2013	867.34
2014	910.9
2015	962.24
2016	1018.76