64% (1995)

51% (2000)

66% (1984)

65% (1986)

51% (1994)

30% (1981)

71% (1990)

0% (1995)

45% (2008)

41% (1996)

42% (1993)

55% (1982)

59% (1992)

50% (1977)

0% (1977)

44% (1995)

46% (1980)

10% (1989)

48% (1986)

0% (1987)