40% (1989)

61% (1977)

62% (1994)

64% (2000)

59% (1984)

100% (1976)

64% (2006)

65% (1978)

68% (1978)

68% (1977)

55% (1985)

56% (1996)

49% (1978)

68% (1981)

56% (1983)

59% (1976)

53% (2002)

51% (1976)

36% (1978)

35% (1986)