Year	Number of
1990	1393.68
1991	1431.68
1992	1471.44
1993	1510.86
1994	1548.45
1995	1590.52
1996	1622.02
1997	1654.29
1998	1686.17
1999	1718.02
2000	1749.37
2001	1765.85
2002	1781.62
2003	1798.84
2004	1819.22
2005	1845.1
2006	1868.78
2007	1891.1
2008	1915.92
2009	1940.95
2010	1969
2011	1996.26
2012	2022.46
2013	2050.07
2014	2083.37
2015	2116.88
2016	2150.85