73% (1977)

68% (2018)

65% (1999)

58% (1976)

34% (1998)

30% (1998)

74% (2011)

40% (1984)

75% (1993)

63% (1982)

80% (1972)

10% (2006)

0% (1987)

40% (2006)

45% (1985)

84% (2000)

0% (2013)

60% (1998)

55% (2010)

52% (2017)