Year	Number of
1990	376.97
1991	385.84
1992	395.69
1993	406.24
1994	417.66
1995	429.81
1996	440.53
1997	451.02
1998	461.54
1999	471.78
2000	481.93
2001	489.59
2002	497.19
2003	506.69
2004	516.16
2005	525.9
2006	535.96
2007	546.5
2008	558.5
2009	572.35
2010	588.34
2011	617.49
2012	649.83
2013	683.37
2014	718.14
2015	753.95
2016	792.43