40% (1990)

0% (1980)

0% (1968)

80% (1967)

25% (1960)

67% (1972)

20% (1976)

0% (1964)

40% (1976)

45% (1991)

72% (1961)

0% (1959)

55% (1963)

0% (1989)

80% (1969)

30% (1981)

50% (1967)

0% (1974)

70% (1961)

30% (1989)