75% (2004)

74% (2008)

76% (2006)

80% (1993)

74% (2009)

71% (2008)

71% (1994)

60% (2010)

57% (2001)

75% (2002)

73% (1994)

75% (2009)

70% (1998)

42% (2009)

70% (1997)

62% (2008)

85% (1982)

50% (2003)

64% (1992)

0% (1989)