75% (2006)

67% (1997)

71% (2007)

71% (2001)

67% (2006)

58% (2005)

54% (2008)

62% (1993)

62% (2008)

52% (2006)

53% (2006)

62% (2005)

66% (2001)

58% (1994)

72% (1994)

66% (2002)

43% (1999)

59% (2009)

49% (2007)

63% (2005)