72% (2005)

43% (2001)

68% (1999)

58% (1995)

65% (2006)

62% (2001)

51% (1998)

75% (2002)

65% (1999)

62% (2002)

71% (2003)

61% (2003)

60% (2000)

52% (2002)

63% (2002)

50% (2006)

65% (2007)

43% (2006)

68% (2003)

67% (1997)