68% (2003)

66% (2006)

55% (2006)

46% (2013)

62% (2008)

65% (2007)

52% (2009)

53% (2002)

61% (2011)

61% (2007)

73% (2004)

63% (2007)

60% (2005)

53% (2005)

63% (2006)

51% (2000)

55% (1998)

56% (1996)

45% (2002)

62% (2001)