58% (1980)

71% (1981)

66% (1994)

62% (2007)

62% (1997)

58% (1991)

62% (2002)

62% (1979)

61% (1987)

63% (1970)

53% (1986)

54% (1985)

55% (1975)

52% (2005)

51% (1982)

75% (1973)

75% (1984)

50% (2017)

43% (1970)

68% (1973)