52% (2008)

61% (2009)

60% (1992)

30% (1997)

60% (2007)

60% (2003)

60% (2001)

40% (1998)

55% (1978)

44% (1999)

63% (1977)

52% (1981)

60% (1974)

64% (2002)

61% (2004)

50% (2009)

60% (1964)

62% (2009)

59% (2020)

53% (2015)