Year	Number of
1990	44400.27
1991	45912.82
1992	47871.83
1993	49548.74
1994	50840.03
1995	51448.27
1996	52466.05
1997	54144.51
1998	55719.7
1999	57800.74
2000	60340.53
2001	63903.3
2002	67754.42
2003	68641.72
2004	70334.11
2005	72766.28
2006	74333.93
2007	76631.17
2008	79701.4
2009	83219.8
2010	86771.39
2011	89422.44
2012	92107.06
2013	95712.96
2014	99843.4
2015	101969.59
2016	104227.84