68% (1978)

50% (1992)

48% (2005)

72% (2008)

70% (1973)

71% (1982)

50% (1995)

71% (1981)

55% (1972)

64% (2014)

53% (1997)

50% (1996)

75% (1988)

53% (1993)

62% (1970)

53% (1989)

68% (2004)

0% (1998)

65% (2002)

63% (1971)