51% (2005)

61% (1986)

42% (2000)

62% (1993)

73% (1982)

63% (1997)

50% (2005)

53% (2003)

45% (1997)

50% (1995)

57% (2000)

46% (1994)

55% (1984)

58% (2005)

64% (1992)

56% (1997)

63% (1997)

52% (2002)

48% (1984)

43% (1987)