1997 |
74%
|
2005 |
79%
|
2004 |
79%
|
1999 |
81%
|
2000 |
81%
|
1991 |
81%
|
1992 |
81%
|
1993 |
81%
|
1990 |
81%
|
1990 |
81%
|
1995 |
54%
|
2016 |
39%
|