50% (1977)

45% (2004)

55% (1999)

65% (1987)

85% (1998)

0% (1970)

57% (1984)

70% (1998)

52% (1980)

50% (1974)

50% (1986)

60% (2011)

0% (1970)

50% (2001)

0% (1970)

0% (1970)

0% (1970)

78% (2005)

30% (1996)

60% (1993)