52% (2008)

61% (2009)

40% (1998)

61% (2004)

52% (1981)

59% (2020)

60% (2001)

30% (1997)

60% (1974)

63% (1977)

64% (2002)

55% (1978)

44% (1999)

60% (1992)

60% (2003)

70% (2013)

60% (2007)

0% (1963)

48% (2005)

50% (2009)