Year	Number of
1990	8130.85
1991	8208.05
1992	8242.14
1993	8261.72
1994	8159.3
1995	8120.33
1996	8125.27
1997	8046.34
1998	7916.53
1999	7940.06
2000	7924.41
2001	8024.63
2002	8068.43
2003	8066.16
2004	8076.17
2005	7969.87
2006	8034.51
2007	8095.12
2008	8151.21
2009	8259.07
2010	8364.03
2011	8494.09
2012	8678.52
2013	8825.66
2014	8850.15
2015	8910.87
2016	9107.01