50% (1987)

60% (1995)

58% (1984)

69% (1982)

51% (1996)

60% (1976)

67% (2003)

0% (1980)

50% (1988)

54% (1980)

45% (1985)

45% (1978)

50% (1996)

62% (1979)

47% (1987)

50% (1994)

10% (1980)

65% (1995)

78% (1987)

57% (1998)