1951
4.0
|
|
1952
4.0
|
|
1953
4.0
|
|
1954
6.0
|
|
1955
6.0
|
|
1956
6.0
|
|
1957
6.0
|
|
1958
6.0
|
|
1959
6.0
|
|
1960
7.0
|
|
1961
6.0
|
|
1962
6.0
|
|
1963
7.0
|
|
1964
7.0
|
|
1965
0.0
|
|
1966
0.0
|
|
1967
0.0
|
|
1968
0.0
|
|
1969
0.0
|
|
1970
0.0
|
|
1971
0.0
|
|
1972
0.0
|
|
1973
0.0
|
|
1974
0.0
|
|
1975
0.0
|
|
1976
0.0
|
|
1977
0.0
|
|
1978
100.0
|
|
1979
100.0
|
|
1980
0.0
|
|
1981
2.0
|
|
1982
2.0
|
|
1983
2.0
|
|
1984
2.0
|
|
1985
2.0
|
|
1986
2.0
|
|
1987
2.0
|
|
1988
2.0
|
|
1989
0.0
|
|
1990
0.0
|
|
1991
0.0
|
|
1992
0.0
|
|
1993
2.0
|
|
1994
2.0
|
|
1995
2.0
|
|
1996
2.0
|
|
1997
1.0
|
|
1998
10.0
|
|
1999
0.0
|
|
2000
0.0
|
|