66% (1999)

70% (1992)

60% (1987)

58% (1982)

77% (1969)

75% (1992)

55% (1969)

60% (1971)

67% (1979)

45% (1969)

40% (1978)

63% (1996)

60% (2002)

79% (1985)

60% (1974)

0% (1992)

0% (1970)

0% (1991)

0% (1982)

60% (1979)