50% (1990)

52% (1997)

50% (2011)

60% (1976)

43% (2014)

62% (2010)

50% (2006)

43% (1988)

40% (2002)

59% (2014)

73% (2003)

58% (2015)

50% (1968)

71% (1980)

60% (2004)

57% (1971)

0% (1994)

62% (2001)

61% (1978)

57% (1990)