67% (1999)

53% (2004)

69% (1995)

69% (1999)

61% (1996)

68% (2000)

66% (1997)

68% (1994)

34% (1982)

56% (1988)

60% (1996)

52% (1986)

57% (1979)

20% (1980)

57% (1996)

47% (1997)

20% (1997)

50% (1983)

62% (1977)

50% (1980)