71% (2013)

70% (2011)

61% (2002)

69% (2009)

65% (1993)

72% (2004)

68% (1984)

72% (2011)

65% (2015)

67% (2006)

73% (2001)

71% (2010)

60% (1995)

69% (2008)

57% (2014)

64% (2009)

60% (1991)

64% (1996)

61% (1994)

65% (2021)