68% (1983)

58% (1982)

44% (2009)

54% (2010)

78% (2015)

65% (1979)

64% (1996)

39% (2010)

55% (2017)

60% (1982)

60% (2014)

59% (1992)

61% (1989)

64% (1990)

53% (1985)

62% (1979)

40% (1989)

50% (2006)

60% (2011)

45% (2007)