50% (1989)

57% (1980)

44% (1974)

54% (1986)

57% (1974)

66% (1979)

56% (1988)

57% (1989)

40% (1973)

56% (1975)

38% (2005)

40% (2000)

50% (2008)

53% (1979)

52% (1989)

28% (1996)

39% (1988)

33% (1986)

10% (1997)

48% (2012)