77% (1995)

80% (1996)

77% (1998)

83% (2004)

66% (2004)

54% (2005)

73% (2004)

62% (2005)

72% (2006)

63% (2005)

58% (2004)

0% (2004)

21% (2005)

53% (2005)

55% (2003)

50% (2004)

43% (2004)

53% (2003)

67% (2010)

47% (2005)