Year	Number of
1990	10663
1991	10692.07
1992	10789.74
1993	10934.15
1994	11187.62
1995	11478.29
1996	11398.85
1997	11388.54
1998	11411.94
1999	11700.56
2000	11906.66
2001	11914.59
2002	11841.98
2003	11841.44
2004	11826.7
2005	11883.36
2006	11778.75
2007	11693.41
2008	11592.65
2009	11655.59
2010	11838.15
2011	11972.83
2012	12152.27
2013	12319.39
2014	12550.63
2015	12813.91
2016	13100.92