72% (2005)

52% (2008)

60% (1983)

67% (1984)

78% (1968)

58% (2002)

0% (1984)

60% (1989)

67% (2004)

50% (1982)

60% (2006)

68% (1971)

0% (1964)

0% (2001)

50% (1967)

83% (1996)

75% (1988)

70% (2007)

70% (1989)

10% (1998)