61% (2004)

70% (2002)

68% (2010)

66% (2001)

69% (2005)

66% (2009)

64% (2009)

40% (2000)

69% (2002)

45% (2000)

53% (2009)

62% (1999)

60% (2000)

64% (2006)

48% (1999)

58% (2002)

60% (2002)

40% (2003)

55% (2000)