Consider the following figure to answer the following questions: 
-During which year was average income climbing the most rapidly?
Definitions:
Environment
The surroundings or conditions in which a person, animal, or plant lives or operates, encompassing both natural and human-made conditions.
Drug Tolerance
A physiological condition where increased doses of a drug are required to achieve effects originally produced by lower doses, due to the body's adaptation to the drug.
Unfamiliar Setting
An environment or situation that is not recognized or known by an individual, often causing discomfort or anxiety.
Discrimination
The unjust or prejudicial treatment of different categories of people, especially on the grounds of race, age, or sex.
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