About: http://webisa.webdatacommons.org/439873195

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	Adjusted for inflation, they have gradually declined over the past two centuries, with occasional spikes due to wars or other external shocks.
http://www.w3.org/ns/prov#wasQuotedFrom	twincities.com