75% (2004)

74% (2008)

80% (1993)

76% (2006)

72% (2008)

74% (2009)

71% (1994)

75% (1999)

76% (2009)

60% (2010)

72% (1994)

48% (2009)

0% (1991)

70% (1997)

56% (2001)

61% (2004)

85% (1997)

85% (1982)

69% (1991)

80% (1994)