Year	Number of
1990	27794.55
1991	27769.33
1992	28076.45
1993	28588.21
1994	28927.02
1995	29308.07
1996	29266.02
1997	29621.96
1998	29707.79
1999	30701.61
2000	32049.88
2001	33597.51
2002	35079.24
2003	35671.66
2004	36164.85
2005	36511.28
2006	36421.34
2007	36486.83
2008	36438.01
2009	36531.81
2010	36689.45
2011	36889.26
2012	37344.66
2013	37937.83
2014	39060.89
2015	39073.66
2016	38355.25