1999 |
89%
|
1990 |
81%
|
1993 |
79%
|
1997 |
71%
|
2015 |
58%
|
2001 |
67%
|
1992 |
75%
|
1995 |
56%
|
2000 |
66%
|
2003 |
66%
|
1993 |
68%
|
1995 |
69%
|
1997 |
72%
|
1977 |
74%
|
2000 |
67%
|
1997 |
68%
|