75% (2004)

73% (2008)

79% (1993)

71% (2008)

75% (2006)

74% (2009)

71% (1994)

60% (2010)

57% (2001)

73% (1994)

75% (2002)

75% (2009)

85% (1982)

42% (2009)

66% (1992)

66% (1996)

89% (1982)

78% (1963)

85% (1999)

70% (1997)