81% (1981)

72% (1984)

75% (1972)

63% (1997)

70% (1985)

71% (2005)

74% (1993)

60% (2021)

71% (1982)

62% (2007)

57% (2002)

67% (2000)

49% (1979)

55% (1986)

60% (2002)

70% (1988)

64% (1977)

61% (2006)

71% (1992)

65% (1962)