88% (1994)

86% (1999)

53% (2003)

68% (2004)

73% (1996)

74% (1989)

67% (2011)

60% (2014)

80% (1995)

72% (1995)

64% (2010)

49% (2004)

56% (1996)

61% (1995)

62% (2002)

57% (2005)

66% (2002)

73% (2007)

62% (2000)

78% (1990)