67% (1999)

70% (2005)

73% (2003)

70% (2010)

68% (2001)

78% (2008)

65% (1997)

69% (2008)

0% (2015)

71% (1999)

40% (2006)

61% (2002)

0% (2009)

0% (2010)

62% (1992)

53% (2012)

55% (1999)