Year	Number of
1990	540.2
1991	549.48
1992	581.08
1993	564.39
1994	591.76
1995	573.72
1996	625.41
1997	738.58
1998	765.61
1999	790.78
2000	826.28
2001	801.47
2002	800.82
2003	808.56
2004	810.24
2005	827.39
2006	840.67
2007	832.36
2008	819.21
2009	820.74
2010	825.56
2011	817.9
2012	784.78
2013	763.57
2014	762.71
2015	761.15
2016	761.55