66% (2002)

60% (1987)

66% (1994)

75% (1998)

69% (1998)

74% (2002)

60% (2010)

66% (1986)

60% (2000)

66% (1997)

65% (1999)

62% (1997)

68% (2005)

58% (1996)

54% (2010)

65% (1999)

69% (1997)

67% (1998)

53% (1994)

69% (2003)