Year	Number of
1990	6118.34
1991	6542.23
1992	6973.58
1993	7425.95
1994	7916.4
1995	8461.34
1996	8643.41
1997	8863.78
1998	9114.85
1999	9368.85
2000	9621.51
2001	9863.08
2002	10095.94
2003	10338.09
2004	10587.67
2005	10858.85
2006	11133.17
2007	11420.32
2008	11760.9
2009	12133.66
2010	12536.83
2011	13308.66
2012	14141.07
2013	15046.67
2014	15991.73
2015	16975.09
2016	18018.61