59% (2000)

68% (1987)

73% (1995)

67% (1995)

59% (1991)

51% (2002)

55% (1999)

64% (2001)

70% (1990)

70% (1989)

52% (1998)

59% (1989)

0% (1970)

20% (1999)

43% (1998)

0% (1994)

56% (1997)

39% (1994)

0% (1996)

0% (1995)