65% (1995)

69% (1975)

46% (2004)

40% (1983)

56% (2000)

58% (1997)

54% (1994)

65% (1974)

58% (1976)

49% (1973)

41% (1998)

59% (2006)

43% (1999)

60% (1969)

58% (1973)

60% (1979)

58% (1981)

40% (1972)

59% (1991)

70% (1988)