64% (2001)

62% (2002)

55% (2000)

59% (2001)

56% (2004)

66% (1998)

51% (2004)

47% (2002)

65% (2007)

60% (2000)

45% (2005)

62% (1998)

51% (2000)

63% (2003)

62% (2000)