59% (1980)

71% (1981)

62% (1997)

66% (1994)

62% (2007)

58% (1991)

50% (2017)

62% (1979)

63% (1970)

52% (2005)

61% (1987)

53% (1986)

62% (2002)

54% (1985)

75% (1973)

57% (1974)

55% (1975)

46% (1980)

20% (1991)

75% (1984)