71% (2012)

72% (2002)

54% (1994)

65% (2007)

48% (1998)

72% (1990)

55% (1986)

69% (1985)

55% (1999)

70% (2013)

72% (2007)

70% (1991)

0% (1988)

60% (2003)

0% (2000)

60% (1997)

90% (2009)

0% (2001)

0% (1996)

60% (1979)