68% (1995)

53% (1982)

51% (2008)

66% (1986)

51% (1993)

38% (1996)

42% (1993)

72% (1990)

51% (1994)

66% (1984)

10% (1977)

30% (1981)

10% (1989)

0% (1988)

46% (1980)

0% (1982)

50% (1977)

48% (1986)

0% (1995)

59% (1992)