75% (2006)

72% (2007)

71% (2001)

67% (2006)

62% (2008)

52% (2006)

66% (1997)

63% (1993)

66% (2002)

58% (1994)

49% (2007)

60% (2009)

54% (2006)

54% (2008)

72% (1994)

43% (1999)

63% (2005)

58% (2003)

65% (1997)

62% (1997)