53% (2004)

68% (2000)

67% (1999)

68% (1999)

66% (1994)

66% (1997)

62% (1996)

58% (1979)

55% (1988)

30% (1982)

60% (1996)

52% (1986)

50% (1983)

57% (1996)

20% (1980)

17% (1997)

0% (1978)

47% (1997)

40% (1997)

0% (2002)