The following table shows average prices per barrel of crude oil: 
Excluding 1970, in what year was crude oil least expensive (adjusted for inflation) ? Use the following inflation table.
Definitions:
Violation
The act of breaking a law, agreement, or rule, resulting in a failure to comply with legal or contractual obligations.
Per Se Analysis
Per se analysis is a legal doctrine under antitrust laws where certain activities or agreements are considered illegal without the need for further inquiry into their actual harm or purpose, due to their inherently anti-competitive nature.
Rule Of Reason
A legal doctrine used to interpret antitrust laws, focusing on the reasonableness of business practices and their effects on competition.
Price-Fixing
An agreement among competitors to raise, fix, or otherwise maintain the price at which their goods or services are sold, which is illegal under antitrust law.
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