Yes sir , i understand your query regarding DCGA as i would like to give you brief as follows:

DGCA (Central Examination Organisation) conducts written examination for issue of licenses to Pilots and Engineers.

Aircraft Maintenance Engineering is the engineering course in aviation. ... Aircraft Maintenance Engineering Common Entrance Test (AME CET 2019) is the national level common entrance test to join AME institute which is approved by DGCA .

As it is per year too many test are taken and its by different institute affilated to it so its difficult to say an exact figure as it is confidential also.