76% (2006)

66% (2014)

62% (2005)

68% (2015)

57% (1995)

68% (1994)

65% (1999)

69% (1993)

69% (1993)

65% (2010)

60% (1993)

63% (2002)

57% (2005)

70% (2011)

68% (2008)

76% (1995)

40% (1997)

66% (1997)

48% (2002)

0% (1994)