1997 |
69%
|
1995 |
56%
|
1993 |
72%
|
1995 |
53%
|
1984 |
75%
|
1999 |
64%
|
1997 |
64%
|
2001 |
64%
|
2000 |
64%
|
1998 |
64%
|
1976 |
67%
|
1993 |
56%
|
1988 |
75%
|
1983 |
62%
|