66% (1999)

54% (2004)

69% (1995)

61% (1996)

68% (1994)

50% (1980)

68% (1999)

55% (1988)

0% (1976)

66% (1997)

20% (1980)

68% (2000)

0% (1978)

47% (1997)

34% (1982)

52% (1986)

50% (1983)

0% (1978)

62% (1977)

57% (1996)