Table 2.

Percentage of adults in a different-sex cohabiting union by age and union type

			Newly Identified Unions (%)
	All Cohabiting Unions (%)	Unmarried Partner Unionsb (%)	Newly Identified Householder Unionsc	Subfamily Cohabiting Unionsd	% of Unions Newly Identified
Agea
15–19	1.78	1.14	0.15	0.49	36
20–29	12.38	10.00	1.29	1.09	19
30–39	7.65	6.52	0.79	0.34	15
40–49	5.15	4.40	0.58	0.17	15
50+	2.50	2.05	0.41	0.04	18
Total	5.52	4.54	0.63	0.34	18
Unweighted n (adults)	313,188	313,188	313,188	313,188	17,588
Unweighted n (cohabitors)	17,588	14,668	1,872	1,048	17,588

^aThe unit of analysis in this table is the person and age reflects each individual’s age. Both males and females are included. Later tables will treat cohabiting couples as units of analysis and age will be measured at the couple level.

^bUnions between the householder and a person identified as their unmarried partner.

^cNewly identified unions between the householder and a person identified as a roommate or other nonrelative.

^dNewly identified unions between two persons who are not householders.

Source: Annual Social and Economic Supplement to the Current Population Survey, 2007–2009.