72% (2003)

61% (2002)

65% (1993)

57% (2006)

64% (2013)

57% (2014)

63% (2007)

52% (1994)

66% (2006)

62% (2007)

70% (1997)

65% (1996)

67% (2002)

71% (1995)

61% (2003)

65% (2000)

55% (2006)

66% (2006)

62% (1999)

60% (2004)