Year	Number of
1990	3237.41
1991	3305.05
1992	3376.65
1993	3468.46
1994	3528.72
1995	3560.5
1996	3610.98
1997	3633.88
1998	3658.26
1999	3728.53
2000	3726.6
2001	3770.59
2002	3816.01
2003	3838.51
2004	3781.91
2005	3703.36
2006	3695.22
2007	3638.9
2008	3646.63
2009	3630.27
2010	3652.1
2011	3694.3
2012	3689.76
2013	3608.11
2014	3551.6
2015	3570.82
2016	3612.97