71% (1980)

55% (2007)

58% (1982)

54% (2004)

55% (1993)

58% (1979)

65% (1970)

45% (1992)

50% (1997)

42% (2010)

30% (1990)

0% (1978)

66% (2016)

70% (1989)

62% (2013)

47% (1977)

70% (1967)

0% (1975)

58% (1974)

54% (1994)