1998 |
37%
|
1997 |
37%
|
1998 |
40%
|
1999 |
33%
|
1999 |
43%
|
1998 |
37%
|
1999 |
41%
|
1996 |
41%
|
1999 |
31%
|
1998 |
41%
|
1998 |
37%
|
1999 |
44%
|
2001 |
43%
|
1997 |
36%
|
2000 |
40%
|