61% (1974)

60% (1972)

64% (1981)

72% (1976)

75% (1991)

68% (1974)

61% (1975)

69% (1983)

41% (2006)

69% (1988)

69% (2019)

71% (1999)

64% (1980)

64% (1989)

62% (1977)

61% (1976)

59% (1998)

71% (1999)

66% (2001)

64% (1978)