67% (2011)

55% (2012)

50% (1992)

100% (1978)

59% (2001)

60% (1975)

100% (1980)

55% (1977)

58% (1982)

58% (1984)

69% (1977)

40% (1986)

0% (1985)

65% (1976)

49% (1990)

60% (1975)

47% (1999)

54% (1973)

60% (1976)

100% (1976)