59% (1990)

69% (2013)

63% (1987)

70% (1972)

65% (1974)

57% (1998)

67% (1997)

68% (1971)

70% (1981)

61% (1972)

66% (1988)

52% (1986)

48% (1974)

68% (1983)

55% (1989)

74% (1995)

67% (1990)

62% (1993)

67% (1998)

70% (1987)