69% (1990)

55% (1989)

52% (1992)

51% (1990)

60% (1994)

61% (1999)

50% (1986)

55% (1998)

56% (1996)

43% (1997)

60% (1999)

57% (1997)

55% (1996)

49% (1987)

50% (1988)

43% (2002)

57% (1981)

78% (1989)

56% (1995)

43% (1987)