75% (2004)

80% (1993)

74% (2008)

75% (2006)

72% (2008)

71% (1994)

73% (2009)

75% (2002)

60% (2010)

57% (2001)

75% (2009)

72% (1994)

42% (2009)

69% (1997)

62% (2008)

68% (1991)

86% (1982)

0% (1993)

77% (1963)

61% (1959)