Year	Number of
1990	621.69
1991	625.66
1992	644.79
1993	663.53
1994	687.05
1995	723.58
1996	755.08
1997	764.86
1998	778.47
1999	773.61
2000	783.93
2001	791.86
2002	813.12
2003	827.09
2004	830.96
2005	836.44
2006	848.32
2007	855.49
2008	865.26
2009	873.74
2010	881.05
2011	893.46
2012	901.17
2013	904.63
2014	913.91
2015	937.2
2016	957.76