74% (2000)

62% (1981)

37% (1992)

62% (1987)

58% (1969)

62% (1986)

50% (1985)

70% (1995)

0% (1991)

40% (1974)

60% (2001)

38% (2001)

0% (1997)

0% (1994)

0% (2001)

0% (1977)

70% (2001)

30% (1992)

50% (2004)

0% (1986)