67% (1952)

28% (2007)

0% (1992)

0% (2012)

64% (1996)

30% (2009)

72% (2005)

74% (1983)

55% (1975)

70% (1975)

71% (2003)

60% (2005)

48% (1991)

55% (2011)

60% (1980)

69% (2005)

70% (2010)

72% (1990)

0% (1988)

75% (1964)