55% (1999)

57% (1995)

0% (1990)

53% (1980)

50% (1992)

57% (1997)

50% (1990)

40% (1988)

50% (1992)

50% (1994)

56% (1996)

50% (1996)

46% (1994)

50% (1993)

40% (1994)

64% (1992)

41% (1990)

50% (1994)

48% (1979)

50% (1996)