75% (2005)

51% (1984)

60% (1983)

56% (1987)

20% (1984)

62% (1980)

54% (1990)

54% (1989)

30% (1991)

30% (1987)

60% (1980)

40% (1990)

51% (1988)

48% (1987)

42% (1991)

60% (1998)

58% (1988)