| 1997 |
34%
|
| 1995 |
49%
|
| 2006 |
69%
|
| 1992 |
60%
|
| 1984 |
67%
|
| 1980 |
60%
|
| 1989 |
59%
|
| 1983 |
54%
|
| 1987 |
60%
|
| 1984 |
46%
|
