60% (1974)

60% (1977)

65% (2002)

35% (1992)

55% (2008)

48% (1997)

53% (1981)

44% (1999)

55% (1978)

52% (1981)

0% (1966)

90% (1948)

62% (2001)

75% (2013)

67% (2009)

40% (1998)

44% (1981)

60% (2007)

61% (2004)

67% (2003)