66% (2009)

67% (2018)

63% (1988)

59% (2009)

58% (1990)

58% (2006)

66% (1990)

74% (2021)

65% (1993)

59% (2015)

62% (2004)

63% (2007)

64% (1970)

55% (2008)

59% (2015)

59% (1981)

66% (2001)

50% (2007)

51% (2009)

49% (2014)