49% (1986)

54% (1987)

64% (2013)

48% (1986)

66% (1989)

73% (2013)

63% (1996)

63% (1988)

71% (1985)

72% (2011)

62% (1996)

65% (2000)

72% (1986)

63% (2002)

60% (1998)

56% (2003)

57% (1993)

65% (1986)

70% (1989)

48% (1991)