67% (1984)

68% (1985)

63% (1984)

67% (1985)

71% (1981)

56% (2022)

56% (1996)

59% (1977)

71% (2002)

46% (1983)

55% (1990)

63% (1977)

53% (1976)

63% (2007)

68% (2001)

60% (1978)

56% (1978)

54% (1976)

52% (1976)

57% (1982)