70% (2008)

67% (2008)

78% (2004)

52% (2008)

70% (2006)

72% (2004)

76% (2007)

54% (2004)

59% (2004)

69% (2007)

70% (2007)

47% (2003)

59% (1980)

61% (2005)

62% (2001)

57% (2002)

35% (2004)

63% (2007)

53% (2005)

60% (1978)