65% (1973)

63% (1992)

70% (1997)

79% (1974)

58% (1985)

62% (2002)

0% (1982)

50% (1972)

47% (1993)

35% (1994)

64% (1989)

0% (1980)

75% (1970)

53% (1990)

0% (1989)

65% (1991)

67% (1977)

57% (1980)

40% (2002)

0% (1985)