55% (1999)

59% (2000)

69% (1987)

67% (1995)

64% (2001)

51% (2002)

74% (1995)

59% (1989)

70% (1989)

59% (1991)

39% (1994)

52% (1998)

70% (1990)

43% (1998)

56% (1997)

0% (1994)

0% (1996)

0% (1970)

20% (1999)

0% (1970)