35% (1987)

43% (1980)

51% (2005)

35% (1977)

70% (1996)

49% (2005)

65% (1982)

60% (1977)

63% (1982)

58% (1982)

64% (1981)

58% (1995)

55% (1978)

62% (1994)

62% (1986)

52% (1977)

0% (1979)

20% (1980)

64% (1991)

80% (1981)