| 1981 | - | 1 | = | 1980 |
| 1981 | - | 2 | = | 1979 |
| 1981 | - | 3 | = | 1978 |
| 1981 | - | 4 | = | 1977 |
| 1981 | - | 5 | = | 1976 |
| 1981 | - | 6 | = | 1975 |
| 1981 | - | 7 | = | 1974 |
| 1981 | - | 8 | = | 1973 |
| 1981 | - | 9 | = | 1972 |
| 1981 | - | 10 | = | 1971 |
| 1981 | - | 11 | = | 1970 |
| 1981 | - | 12 | = | 1969 |
| 1981 | - | 13 | = | 1968 |
| 1981 | - | 14 | = | 1967 |
| 1981 | - | 15 | = | 1966 |
| 1981 | - | 16 | = | 1965 |
| 1981 | - | 17 | = | 1964 |
| 1981 | - | 18 | = | 1963 |
| 1981 | - | 19 | = | 1962 |
| 1981 | - | 20 | = | 1961 |
| 1981 | - | 21 | = | 1960 |
| 1981 | - | 22 | = | 1959 |
| 1981 | - | 23 | = | 1958 |
| 1981 | - | 24 | = | 1957 |
| 1981 | - | 25 | = | 1956 |
| 1981 | - | 26 | = | 1955 |
| 1981 | - | 27 | = | 1954 |
| 1981 | - | 28 | = | 1953 |
| 1981 | - | 29 | = | 1952 |
| 1981 | - | 30 | = | 1951 |
| 1981 | - | 31 | = | 1950 |
| 1981 | - | 32 | = | 1949 |
| 1981 | - | 33 | = | 1948 |
| 1981 | - | 34 | = | 1947 |
| 1981 | - | 35 | = | 1946 |
| 1981 | - | 36 | = | 1945 |
| 1981 | - | 37 | = | 1944 |
| 1981 | - | 38 | = | 1943 |
| 1981 | - | 39 | = | 1942 |
| 1981 | - | 40 | = | 1941 |
| 1981 | - | 41 | = | 1940 |
| 1981 | - | 42 | = | 1939 |
| 1981 | - | 43 | = | 1938 |
| 1981 | - | 44 | = | 1937 |
| 1981 | - | 45 | = | 1936 |
| 1981 | - | 46 | = | 1935 |
| 1981 | - | 47 | = | 1934 |
| 1981 | - | 48 | = | 1933 |
| 1981 | - | 49 | = | 1932 |
| 1981 | - | 50 | = | 1931 |