53% (2004)

67% (1999)

69% (1999)

66% (1997)

68% (2000)

67% (1994)

34% (1982)

61% (1996)

60% (1996)

47% (1997)

56% (1988)

62% (1977)

20% (1980)

0% (1978)

50% (1980)

70% (1978)

52% (1986)

57% (1996)

0% (1976)

0% (1978)