Year	Number of
1990	1750.96
1991	1781.62
1992	1808.71
1993	1840.84
1994	1877.64
1995	1913.38
1996	1933.97
1997	1953.21
1998	1969.76
1999	1989.16
2000	2010.34
2001	2079.91
2002	2152.89
2003	2229.38
2004	2310.59
2005	2395.63
2006	2449.72
2007	2505.28
2008	2565.1
2009	2631.79
2010	2702.17
2011	2738.97
2012	2777.02
2013	2816
2014	2855.88
2015	2896.65
2016	2938.56