53% (2004)

67% (1999)

66% (1994)

68% (1999)

66% (1997)

68% (2000)

61% (1996)

56% (1988)

30% (1982)

50% (1980)

20% (1980)

58% (1979)

15% (1997)

52% (1986)

53% (2003)

0% (1981)

0% (1978)

0% (2002)

50% (1983)

62% (1977)