78% (2010)

57% (2003)

68% (1988)

56% (2008)

57% (2003)

57% (1986)

55% (1987)

50% (2005)

54% (1995)

56% (1998)

40% (1997)

54% (1987)

65% (1986)

60% (2000)

71% (1999)

77% (1998)

42% (1998)

64% (2005)

70% (1995)

61% (1990)