52% (1978)

59% (1983)

67% (1992)

56% (1977)

46% (1979)

60% (1991)

59% (1981)

64% (1982)

61% (1982)

20% (1995)

70% (1994)

63% (1984)

49% (2018)

58% (1990)

52% (1986)

60% (1975)

46% (1980)

40% (1979)

50% (1994)

55% (2001)