Year	Number of
1990	1454.96
1991	1490.17
1992	1537.85
1993	1598.79
1994	1619.74
1995	1671.75
1996	1714.15
1997	1775.92
1998	1828
1999	1866.42
2000	1928.32
2001	1971.21
2002	2052.14
2003	2116.35
2004	2174.97
2005	2205.38
2006	2247.91
2007	2301.33
2008	2385.46
2009	2476.6
2010	2566.85
2011	2650.91
2012	2737.49
2013	2810.75
2014	2888.89
2015	2968.22
2016	3038.35