68% (2003)

67% (2006)

47% (2013)

62% (2008)

56% (2006)

74% (2004)

66% (2007)

60% (2005)

61% (2007)

63% (2007)

64% (2006)

61% (2011)

53% (2002)

54% (2005)

52% (2009)

45% (2002)

56% (1996)

51% (2000)

62% (2001)

69% (2006)