60% (1999)

62% (2008)

83% (1995)

52% (2004)

56% (2007)

61% (2002)

66% (1997)

68% (2000)

65% (1997)

67% (1999)

66% (2011)

67% (1999)

63% (2007)

71% (1993)

54% (2002)

73% (2009)

65% (1994)

52% (2006)

79% (1991)

73% (1992)