Year	Number of
1990	607.09
1991	627.94
1992	653.5
1993	676.06
1994	692.3
1995	720.08
1996	750.52
1997	762.27
1998	778.93
1999	783.8
2000	787.07
2001	797.35
2002	808.43
2003	810.52
2004	823.57
2005	821.88
2006	836.44
2007	837.65
2008	845.59
2009	859.67
2010	879.9
2011	898.43
2012	914.44
2013	928.48
2014	943.65
2015	971.97
2016	997.32