"Figure 1: Cohabiting couples are the fastest-growing family type","" "Number of families by family type, UK, 1996 to 2018","" "","" "Notes","1. Married couple families include both opposite-sex and same-sex married couples. 2. Cohabiting couple families include both opposite-sex and same-sex cohabiting couples" "Unit","Millions" "","" "","Married or civil partner couple families^1^","Cohabiting couple families^2^","Lone parent families " "1996","12.6","1.5","2.4" "1997","12.6","1.7","2.4" "1998","12.5","1.8","2.5" "1999","12.4","1.9","2.5" "2000","12.4","2.0","2.4" "2001","12.3","2.2","2.5" "2002","12.3","2.2","2.5" "2003","12.2","2.3","2.6" "2004","12.2","2.4","2.7" "2005","12.3","2.4","2.7" "2006","12.3","2.5","2.7" "2007","12.3","2.6","2.7" "2008","12.3","2.7","2.8" "2009","12.3","2.7","2.9" "2010","12.3","2.8","2.9" "2011","12.3","2.9","2.9" "2012","12.4","2.9","3.0" "2013","12.4","2.9","3.0" "2014","12.6","3.1","3.0" "2015","12.5","3.2","3.0" "2016","12.7","3.3","2.9" "2017","12.9","3.3","2.8" "2018","12.8","3.4","2.9"