59% (2005)

65% (2003)

65% (2000)

67% (2000)

66% (2004)

64% (1998)

65% (2005)

66% (1999)

63% (2011)

69% (2002)

64% (2007)

62% (2006)

60% (2004)

56% (2006)

70% (1996)

45% (2002)

60% (2003)

65% (2007)

45% (1999)

56% (1998)