75% (2006)

58% (2003)

74% (2002)

67% (2007)

69% (2011)

54% (2009)

70% (2004)

65% (2006)

67% (2002)

60% (2011)

66% (2002)

63% (2001)

57% (2008)

68% (2007)

80% (2010)

0% (1997)

73% (2009)

57% (2010)

53% (2003)

0% (2002)