85% (1976)

0% (2006)

70% (1982)

55% (1997)

55% (1996)

0% (2000)

0% (2000)

60% (2003)

50% (1998)

45% (1997)

60% (2000)

0% (2011)

0% (2010)

74% (1987)

80% (2004)

0% (1999)

87% (1971)

0% (1995)

0% (2007)

70% (2004)