1992 |
83%
|
1988 |
76%
|
1985 |
61%
|
1981 |
60%
|
2010 |
74%
|
1985 |
74%
|
1962 |
85%
|
1989 |
51%
|
1987 |
58%
|
1982 |
49%
|
1961 |
71%
|
1993 |
41%
|