Year	Number of
1990	747.68
1991	743.07
1992	757.37
1993	776.12
1994	817.37
1995	877.06
1996	960.91
1997	1057.15
1998	1145.89
1999	1210.48
2000	1272.65
2001	1324.92
2002	1353.48
2003	1397.53
2004	1426.81
2005	1459.05
2006	1512.54
2007	1550.8
2008	1631.97
2009	1677.95
2010	1728.3
2011	1717.7
2012	1746.28
2013	1775.15
2014	1819.46
2015	1834.86
2016	1847.37