72% (1985)

60% (1987)

52% (2000)

0% (1984)

72% (1995)

64% (1982)

65% (1981)

0% (1994)

0% (1988)

0% (1993)

52% (1989)

52% (1991)

40% (1988)

61% (1998)

71% (1980)

0% (2009)

60% (1982)

62% (1983)

0% (1992)

40% (1984)