61% (1999)

51% (1986)

59% (1987)

41% (1987)

55% (1998)

60% (1994)

60% (1999)

57% (1997)

51% (1990)

55% (1996)

56% (1996)

49% (1986)

45% (1995)

43% (2002)

43% (1997)

45% (1995)

50% (1988)

49% (1987)

60% (1987)

43% (1987)