66% (1968)

75% (2018)

71% (1969)

68% (1988)

74% (1988)

70% (1974)

75% (1983)

52% (1979)

46% (1987)

48% (2013)

40% (2002)

71% (1971)

55% (1992)

73% (2004)

30% (1981)

62% (1975)

72% (2000)

70% (1963)

55% (1975)

71% (2006)