49% (2007)

63% (1986)

60% (1984)

65% (2011)

61% (1982)

54% (1982)

65% (1991)

62% (1992)

62% (1980)

54% (1980)

63% (1990)

50% (1995)

42% (1982)

65% (1987)

59% (1988)

12% (1980)

59% (1984)

38% (1965)