57% (1982)

50% (1977)

0% (1989)

80% (1988)

0% (1988)

10% (1984)

58% (1981)

55% (1980)

45% (1984)

59% (1992)

60% (2005)

60% (1999)

71% (1996)

65% (1995)

44% (1995)

0% (1975)

10% (1996)

0% (1982)

77% (1983)

45% (2008)