67% (2003)

64% (1977)

67% (1983)

43% (1987)

59% (1990)

60% (2010)

58% (1999)

60% (1991)

67% (2014)

68% (1989)

62% (2008)

60% (1979)

55% (1999)

49% (2004)

61% (2013)

46% (2016)

57% (1997)

55% (2018)

61% (1992)

58% (1980)