73% (2020)

68% (2007)

69% (2014)

66% (2017)

51% (2018)

70% (2008)

65% (2011)

63% (2006)

60% (2001)

70% (1996)

65% (2012)

72% (1994)

60% (2012)

62% (1992)

50% (1995)

57% (1998)

50% (2010)