53% (1997)

65% (1998)

55% (1990)

55% (2000)

52% (2000)

59% (1987)

20% (1985)

50% (1986)

51% (1982)

55% (2007)

0% (1993)

65% (1989)

40% (1986)

66% (1997)

42% (1987)

50% (1998)

62% (1987)

35% (1989)

62% (1989)

60% (1998)