As part of the United States Census, data is also collected on the number of persons in each household. The census data for four decades is summarized below. 
(a)In a few sentences describe how the proportion of households with 4 people has changed from 1970 to 2000.
(b)What size of household appears to have decreased the most from 1970 to 2000?
Definitions:
Corporate Employees
Individuals who are hired to work for a corporation and often enjoy certain benefits and legal protections.
Directors
Individuals elected by shareholders to oversee and make decisions for a corporation.
Shareholders
Individuals or entities that own shares in a corporation, thereby holding a portion of its equity.
Directors
Members of a company's board who are elected by shareholders to make important decisions regarding the company's management and policies.
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