72% (2005)

62% (1995)

61% (2005)

78% (1987)

0% (1984)

60% (1989)

70% (2000)

60% (2006)

70% (1989)

10% (1998)

0% (1964)

74% (1993)

70% (2007)

74% (1999)

75% (1988)

78% (1968)

50% (1982)

70% (2005)

60% (1979)

68% (1971)