54% (1976)

55% (1999)

49% (2004)

61% (2001)

56% (2017)

57% (2007)

58% (2002)

50% (1988)

52% (2013)

46% (1996)

49% (2010)

55% (2010)

51% (1991)

0% (2017)

44% (1981)

40% (1988)

60% (1960)

50% (1979)

0% (2016)