30% (2000)

55% (2002)

0% (1956)

33% (1993)

52% (1997)

60% (1980)

58% (2003)

70% (1991)

69% (1983)

52% (1994)

0% (1978)

70% (1986)

81% (1954)

42% (1983)

51% (1979)

67% (1998)

50% (1994)

61% (2004)

0% (1989)

76% (1971)