How many polls are taken in the united states every year ?

Election polling has evolved considerably since that inaugural issue. Perhaps most notably, there has been an explosion in the number of election polls in the United States. Traugott (2005) estimated a 900-percent increase in trial heat polls between 1984 and 2000. The number has continued to grow since then, due largely to the rise in interactive-voice-response (IVR) and Internet polls since the 2000 election.

from the conditions of the working class in england by friedrich engels,the main idea is :

manchester's leaders hoped to oppress its working class to benefit factory owners.