53% (1989)

42% (1991)

61% (1980)

52% (1990)

58% (1988)

20% (1984)

30% (1991)

49% (1988)

48% (1987)

30% (1987)

48% (1984)

40% (1990)

60% (1983)

65% (2005)

60% (1980)

56% (1987)

60% (1998)