54% (2004)

45% (2001)

53% (2003)

63% (2006)

60% (2008)

39% (2004)

72% (2006)

62% (2009)

55% (2005)

38% (2010)

60% (2011)

53% (2003)

50% (2005)

72% (1995)

62% (2004)

50% (2005)

45% (2007)

65% (2001)

61% (2004)

58% (2007)