Year	Number of
1990	5040.87
1991	5206.54
1992	5380.18
1993	5564.84
1994	5767.85
1995	5989.54
1996	6139
1997	6292.01
1998	6453.29
1999	6619.39
2000	6790.89
2001	6836.74
2002	6884.91
2003	6938.3
2004	7001.06
2005	7072.07
2006	7009.26
2007	6950.07
2008	6896.42
2009	6851.97
2010	6817.39
2011	6922.51
2012	7024.88
2013	7127.15
2014	7236.71
2015	7362.14
2016	7494.67