"Figure 4: Index of Gini coefficient, S80-S20 ratio, P90-P10 ratio and Palma ratio for equivalised disposable income, all households","" "UK, 1977 to financial year ending 2017","" "","" "Notes","1. Indices are calculated relative to 1977 values. 2. 1994/95 represents the financial year ending 1995, and similarly through to 2016/17, which represents the financial year ending 2017. 3. 2016/17 results are provisional. " "Unit","Index, 1977 = 100" "","" "Year","Gini Coefficient","S80-S20 ratio","P90-P10 ratio","Palma ratio" "1977","100.0","100.0","100.0","100.0" "1978","97.4","97.1","97.1","96.4" "1979","100.6","101.7","100.0","99.8" "1980","104.8","108.2","105.9","107.0" "1981","106.3","107.2","102.9","109.7" "1982","105.0","104.7","100.0","107.8" "1983","107.8","109.2","105.9","112.0" "1984","104.2","103.3","102.9","106.7" "1985","111.6","114.5","111.8","117.4" "1986","116.0","120.1","111.8","127.3" "1987","121.9","131.7","123.5","137.4" "1988","128.8","147.6","135.3","151.6" "1989","126.0","145.1","138.2","144.5" "1990","134.9","163.3","147.1","165.4" "1991","130.6","155.3","147.1","154.4" "1992","127.1","147.1","138.2","146.9" "1993","127.8","145.9","135.3","149.1" "1994/95","124.1","138.9","129.4","141.0" "1995/96","121.1","135.0","126.5","134.6" "1996/97","126.1","144.6","132.4","145.4" "1997/98","126.7","146.4","135.3","146.0" "1998/99","130.0","153.5","138.2","154.0" "1999/00","131.3","158.4","138.2","156.0" "2000/01","128.5","151.4","138.2","150.3" "2001/02","133.0","159.8","141.2","160.7" "2002/03","124.1","141.8","129.4","139.9" "2003/04","124.7","142.2","123.5","142.9" "2004/05","120.4","134.6","123.5","134.1" "2005/06","124.3","141.1","129.4","141.5" "2006/07","127.3","148.1","132.4","147.6" "2007/08","125.5","148.5","135.3","142.7" "2008/09","125.6","144.6","129.4","143.9" "2009/10","122.0","137.9","123.5","136.4" "2010/11","123.6","137.8","123.5","140.3" "2011/12","118.5","129.3","117.6","130.6" "2012/13","122.2","136.5","120.6","138.0" "2013/14","118.8","134.5","123.5","129.4" "2014/15","119.6","134.7","123.5","129.3" "2015/16","116.1","127.4","120.6","128.3" "2016/17","115.6","127.1","120.9","127.2"