58% (1980)

54% (1973)

41% (1983)

51% (1991)

71% (2003)

61% (1997)

46% (1977)

0% (1976)

42% (1976)

20% (2002)

48% (1980)

53% (1975)

48% (1980)

66% (1976)

33% (1976)

54% (1984)

54% (1980)

50% (1976)

62% (1975)

50% (1979)