Year	Number of
1990	2061.94
1991	1999.64
1992	1952.14
1993	1986.12
1994	2062.95
1995	2159.18
1996	2191.05
1997	2199.67
1998	2192.04
1999	2242.88
2000	2251.85
2001	2272.49
2002	2315.95
2003	2348.86
2004	2369.88
2005	2364.05
2006	2368.66
2007	2354.17
2008	2365.16
2009	2459.38
2010	2522.51
2011	2516.76
2012	2534.99
2013	2561.96
2014	2560.59
2015	2624.65
2016	2704.59