25% (1976)

53% (1999)

70% (1978)

53% (1977)

59% (1980)

46% (2005)

43% (1977)

60% (1967)

40% (1970)

30% (1976)

57% (1968)

20% (1976)

0% (1969)

64% (1975)

70% (1968)

20% (1975)

0% (1971)

58% (1969)

0% (1968)

70% (1972)