88% (1994)

67% (2004)

85% (1999)

78% (1990)

64% (2010)

80% (1995)

67% (2011)

66% (2000)

74% (1989)

73% (2007)

56% (1996)

53% (2003)

54% (2009)

60% (2014)

58% (2005)

79% (2004)

61% (1995)

66% (1997)

63% (1998)

68% (2007)