45% (1997)

0% (1994)

50% (1977)

50% (1994)

57% (1975)

62% (2003)

51% (2000)

54% (1996)

48% (1983)

66% (1973)

63% (1974)

45% (1990)

0% (1991)

65% (1994)

70% (1987)

60% (1991)

62% (1995)

74% (1986)

37% (1977)

62% (1990)