70% (1993)

47% (2000)

70% (1978)

0% (1999)

0% (1991)

55% (2007)

70% (2000)

10% (2002)

30% (1964)

45% (2002)

90% (1995)

0% (1978)

0% (1998)

0% (1981)

0% (1978)

10% (1982)

20% (1999)

0% (1998)

80% (1988)

0% (1996)