Year	Number of
1990	354.79
1991	369.14
1992	385.67
1993	404.47
1994	421.26
1995	440.55
1996	462.12
1997	485.91
1998	512.05
1999	541.84
2000	575.99
2001	607.39
2002	638.62
2003	669.74
2004	701.57
2005	735.87
2006	769.57
2007	802.77
2008	836.95
2009	870.06
2010	903.29
2011	942.24
2012	976.53
2013	1009.33
2014	1042.25
2015	1076.5
2016	1122.88