78% (1999)

65% (2013)

48% (2006)

61% (1968)

70% (1965)

71% (2004)

50% (2011)

50% (2014)

43% (2001)

60% (2002)

39% (2011)

50% (2001)

0% (1997)

49% (1973)

0% (1984)

45% (2005)

35% (1971)

47% (2005)

10% (2007)

30% (1971)