70% (1979)

50% (1983)

60% (1990)

70% (1973)

40% (1960)

47% (1999)

0% (1995)

0% (1955)

48% (1991)

70% (1980)

65% (1981)

30% (1993)

47% (2009)

50% (1987)

76% (1979)

0% (1954)

55% (1982)

37% (1977)

0% (1959)

60% (1990)