64% (1984)

66% (2010)

63% (2001)

56% (1986)

52% (1981)

51% (1989)

57% (1980)

55% (1989)

38% (1987)

46% (1991)

65% (2017)

62% (2013)

62% (1999)

48% (1990)

61% (1996)

59% (2006)

50% (1986)

63% (1996)

50% (1976)

42% (1989)