62% (1984)

66% (1997)

55% (1986)

52% (1989)

59% (1988)

58% (1971)

76% (2004)

80% (2002)

82% (2012)

20% (1984)

0% (2000)

80% (2005)

60% (2007)

0% (2009)

65% (2006)

0% (1996)

0% (2005)