54% (1969)

33% (1995)

46% (1986)

57% (1996)

59% (1974)

37% (1998)

70% (1995)

86% (1980)

71% (2001)

35% (1985)

50% (1973)

56% (2001)

50% (1972)

58% (2001)

47% (2002)

56% (2001)

45% (1969)

50% (1996)

30% (1978)

58% (1975)