57% (1984)

63% (1984)

50% (1993)

44% (2009)

59% (1985)

59% (1986)

66% (1991)

56% (1992)

56% (1989)

49% (1995)

40% (1996)

57% (1995)

26% (1995)

34% (1993)

44% (1989)

50% (1994)

40% (1992)