60% (2000)

83% (1991)

82% (2005)

52% (2012)

71% (2003)

64% (1996)

87% (2007)

65% (2007)

70% (2001)

65% (2009)

83% (2003)

30% (1992)

62% (1999)

53% (2008)

70% (2000)

79% (1990)

83% (1986)

60% (2000)

40% (1994)

35% (2005)