65% (1977)

55% (1978)

60% (1991)

0% (1971)

67% (1973)

60% (1992)

50% (1996)

49% (1975)

62% (1993)

0% (2002)

80% (1978)

60% (1978)

0% (1993)

40% (1997)

64% (1982)

0% (1996)

0% (1985)

59% (1976)

0% (1980)

70% (1982)