Year	Number of
1990	5133.74
1991	5171.71
1992	5014.55
1993	4791.18
1994	4728.99
1995	4734.18
1996	4553.58
1997	4551.74
1998	4503.76
1999	4622.06
2000	4442.36
2001	4354.15
2002	4303.47
2003	4300.63
2004	4344.17
2005	4328
2006	4336.89
2007	4360.72
2008	4337.47
2009	4290.75
2010	4259.19
2011	4209.94
2012	4219.83
2013	4175.96
2014	4037.56
2015	4024.06
2016	4020.65