54% (2004)

45% (1998)

52% (1973)

61% (1983)

70% (1982)

62% (2011)

63% (1989)

62% (1993)

60% (1979)

52% (2000)

69% (1987)

60% (1989)

50% (1992)

60% (1994)

62% (1974)

60% (1992)

65% (2013)

67% (1990)

54% (2011)

67% (1998)