63% (1993)

59% (1983)

60% (1985)

33% (1978)

56% (1997)

64% (2001)

52% (1987)

66% (1988)

63% (1986)

63% (1986)

56% (1987)

60% (2006)

57% (2014)

55% (1977)

58% (1989)

71% (1991)

64% (2004)

66% (1992)

73% (1992)

0% (1992)