52% (2008)

60% (2001)

61% (2009)

30% (1997)

64% (2002)

52% (1981)

55% (1978)

60% (1974)

53% (2015)

60% (2003)

44% (1999)

60% (1964)

50% (2009)

40% (1998)

63% (1977)

55% (1981)

60% (1992)

61% (2004)

46% (1981)

60% (2013)