Year	Number of
1990	547.28
1991	565.56
1992	575.79
1993	587.13
1994	598.48
1995	606.15
1996	619.38
1997	617.09
1998	623.59
1999	642.17
2000	649.87
2001	670.45
2002	696.16
2003	709.63
2004	730.06
2005	741.32
2006	765
2007	765.47
2008	785.64
2009	809.85
2010	832.38
2011	844.88
2012	879.21
2013	914.42
2014	965.97
2015	1015.77
2016	1068.47