Author:  Mikhail Bulychev

Function:
    
    The program calculates the total volume of the market for the instrument
    and calculates the own firm's volume for the same instrument.
    This program also shows a percentage of the own volume to the total one, 
    expressed in percent.

How to use:
    Row 29 sets a list of classes to collect statistics for.
    If "classes = get_classes_list()" the statistics is collected for all classes