51% (1978)

55% (2001)

59% (1983)

68% (1992)

49% (2018)

62% (1982)

60% (1991)

64% (1982)

50% (1996)

50% (1989)

52% (1986)

46% (1979)

0% (2000)

70% (1994)

46% (1980)

50% (1994)

58% (1990)

63% (1984)

20% (1995)

56% (1977)