69% (1984)

58% (2007)

61% (1982)

66% (1987)

58% (2015)

57% (2009)

63% (1998)

67% (2012)

62% (2003)

53% (1983)

60% (1982)

45% (2002)

57% (1981)

50% (1986)

61% (1987)

58% (1987)

57% (1985)

57% (1987)

50% (1985)

56% (1996)