65% (1984)

66% (2001)

52% (2005)

53% (1986)

51% (1972)

64% (1995)

71% (1999)

50% (1982)

60% (1975)

53% (1973)

46% (2006)

53% (1985)

63% (1983)

67% (1975)

46% (1974)

47% (1975)

53% (1983)

46% (1979)

48% (1992)

0% (1975)