Year	Number of
1990	349.56
1991	372.21
1992	394.52
1993	426.9
1994	447.19
1995	460.73
1996	464.18
1997	471.36
1998	505.85
1999	539.99
2000	590.62
2001	610.81
2002	626.34
2003	673.71
2004	671.46
2005	687.21
2006	742
2007	792.98
2008	829.03
2009	855.43
2010	852.71
2011	895.73
2012	955.88
2013	976.5
2014	1013.95
2015	1055.88
2016	1098.93