Use the data given below to answer the following question(s) .
The table below shows the car sales from the year 2002-2007.The forecaster assumes a smoothing constant of 0.8 and uses the exponential smoothing model to determine the forecast for the future. 
-Using the given data,determine the value of the mean absolute deviation.
Definitions:
Cirrhosis
A chronic liver disease marked by degeneration of cells, inflammation, and fibrous thickening of tissue.
Excessive Drinking
The consumption of alcohol in amounts that are harmful to one's health or lead to behavior that is damaging to oneself or others.
Alcoholism
A chronic condition characterized by uncontrolled drinking and a preoccupation with alcohol, despite adverse effects.
Drinking Alcohol
The consumption of beverages containing ethanol, which can have various social, cultural, and physiological effects.
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