71% (1992)

66% (2001)

74% (2010)

57% (1999)

71% (2001)

69% (2007)

76% (2003)

66% (1999)

66% (2005)

77% (2000)

57% (2003)

42% (2005)

46% (1989)

76% (1999)

47% (2001)

64% (2014)

62% (2001)

75% (2003)

62% (1990)

72% (2013)