Year	Number of
1954	1680
1955	1707
1956	1729
1957	1754
1958	1773
1959	1794
1960	1815
1961	1831
1962	1840
1963	1856
1964	1864
1965	1868
1966	1861
1967	1855
1968	1841
1969	1826
1970	1799
1971	1766
1972	1733
1973	1696
1974	1658
1975	1619
1976	1575
1977	1532
1978	1486
1979	1447
1980	1412
1981	1381
1982	1346
1983	1314
1984	1290
1985	1265
1986	1235
1987	1217
1988	1192
1989	1158
1990	1132
1991	1107
1992	1079
1993	1057
1994	1047
1995	1044
1996	1052
1997	1067
1998	1083
1999	1084
2000	1071
2001	1043
2002	996
2003	953
2004	909
2005	883
2006	866
2007	865
2008	869
2009	862
2010	854
2011	830
2012	808
2013	774
2014	747
2015	721