Year	Number of
1990	11628.72
1991	11978.74
1992	12320.71
1993	12640.45
1994	12931.87
1995	13234.91
1996	12724.88
1997	12259.85
1998	11797.66
1999	11335.79
2000	10891.68
2001	10919.23
2002	10949.07
2003	10950.24
2004	10950.08
2005	10954.63
2006	10873.38
2007	10813.97
2008	10752.12
2009	10710.39
2010	10672.64
2011	10616.02
2012	10587.75
2013	10557.82
2014	10646.59
2015	10764.05
2016	10909.9