Year	Number of
1990	690.75
1991	709.83
1992	721.15
1993	726.02
1994	739.4
1995	741.44
1996	749.06
1997	755.48
1998	748.26
1999	757.02
2000	775.9
2001	787.02
2002	806.32
2003	828.99
2004	862.63
2005	885.67
2006	908.46
2007	932.31
2008	955.64
2009	985.06
2010	1007.74
2011	1034.22
2012	1072.58
2013	1090.14
2014	1126.89
2015	1156.81
2016	1191.45