64% (1998)

56% (1984)

63% (1996)

32% (1989)

54% (1996)

38% (1985)

68% (1995)

48% (1994)

51% (1999)

57% (1984)

61% (1957)

35% (1995)

48% (1986)

10% (1991)

10% (2001)