62% (2008)

60% (1999)

82% (1995)

66% (1999)

53% (2004)

56% (2007)

72% (2009)

68% (1994)

69% (1995)

69% (1993)

62% (2002)

68% (2000)

68% (1999)

66% (1997)

78% (1991)

55% (2002)

50% (1993)

71% (1992)

53% (2006)

66% (1997)