63% (1964)

61% (1996)

69% (1995)

58% (1994)

53% (1991)

44% (1990)

46% (1968)

58% (1994)

53% (1994)

48% (1995)

59% (2005)

49% (1995)

60% (1993)

37% (1990)

45% (1984)

60% (1986)

60% (1990)

50% (1992)

63% (1993)

50% (1991)