1987 |
81%
|
1996 |
86%
|
2003 |
24%
|
2005 |
53%
|
1999 |
77%
|
2006 |
63%
|
2001 |
74%
|
1988 |
76%
|
1998 |
64%
|
1998 |
64%
|