54% (1979)

64% (1998)

54% (1988)

50% (1972)

0% (1996)

47% (1999)

60% (1998)

49% (2007)

51% (1970)

62% (1980)

59% (1988)

47% (1977)

44% (1986)

50% (1975)

0% (1985)

50% (1969)

58% (1963)

43% (1959)

48% (1994)

53% (1978)