68% (2019)

73% (2008)

69% (2018)

70% (2024)

65% (1990)

63% (2011)

67% (2013)

60% (2009)

56% (2005)

50% (1987)

0% (1970)

56% (2003)

57% (1998)

52% (2018)

62% (2014)

70% (1992)

0% (1980)

53% (2012)

73% (2023)

50% (1976)