1981 |
84%
|
2003 |
51%
|
2004 |
52%
|
2004 |
74%
|
2002 |
85%
|
2002 |
64%
|
2001 |
74%
|
1999 |
58%
|
2000 |
62%
|
2002 |
55%
|
2000 |
66%
|