About: http://webisa.webdatacommons.org/270595229

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	However, looking at couples as a unit, the proportion participating in both types of plans increased to about 35 percent in 1998 and 2009.
http://www.w3.org/ns/prov#wasQuotedFrom	ssa.gov