38% (1976)

38% (1999)

65% (1973)

40% (2002)

62% (1994)

47% (1999)

0% (1979)

30% (1994)

61% (2001)

60% (2004)

45% (2005)

55% (2006)

57% (1978)

60% (1994)

80% (1999)

0% (2000)

63% (1988)

60% (1973)

66% (1990)

42% (1987)