63% (1984)

55% (1986)

51% (1989)

65% (1997)

59% (1988)

20% (1984)

58% (1971)

82% (2012)

65% (2006)

85% (2005)

78% (2004)

0% (1996)

60% (2007)

80% (2002)

0% (2009)

0% (2005)