74% (2000)

55% (2009)

67% (2001)

30% (2012)

60% (2001)

57% (2006)

60% (2004)

66% (2000)

64% (2005)

60% (2007)

50% (1997)

71% (2000)

65% (2008)

73% (1995)

68% (2006)

53% (1995)

57% (2008)

62% (1993)