57% (1996)

43% (1992)

55% (1999)

45% (1986)

40% (1991)

47% (1994)

50% (1993)

56% (1991)

45% (1992)

55% (1981)

40% (1994)

55% (1981)

48% (1979)

50% (1984)

0% (1992)

50% (1993)

50% (1980)

57% (1978)

50% (1993)

53% (1995)