80% (1972)

37% (1976)

59% (1994)

50% (1979)

45% (2005)

38% (1999)

40% (2002)

50% (1993)

62% (1994)

70% (1984)

30% (1985)

67% (1979)

56% (1991)

67% (1975)

47% (1996)

53% (1990)

87% (2004)

65% (1973)

32% (1983)

68% (1969)