Year	Number of
1990	332.15
1991	355.69
1992	379.25
1993	402.63
1994	440.72
1995	467.53
1996	495.77
1997	528.53
1998	562.83
1999	607.46
2000	649.24
2001	680.06
2002	710.8
2003	740.88
2004	771.38
2005	801.23
2006	814.37
2007	819.37
2008	823.23
2009	823.42
2010	838.15
2011	839.67
2012	838.8
2013	839.98
2014	852.08
2015	876.47
2016	899.71