74% (2007)

59% (2002)

60% (2008)

64% (1992)

49% (1997)

0% (1998)

0% (1976)

46% (1982)

42% (2009)

0% (1997)

52% (2005)

0% (2006)

70% (1996)

78% (1994)

61% (2005)

0% (1975)

0% (1984)

40% (2005)

80% (2005)

0% (2002)