54% (2004)

45% (2001)

53% (2003)

63% (2006)

39% (2004)

55% (2005)

72% (2006)

38% (2010)

50% (2005)

61% (2004)

60% (2011)

58% (2007)

62% (2004)

60% (2008)

62% (2009)

65% (2007)

30% (2010)

58% (1996)

45% (2007)

50% (2005)