Hi There,
Fully agree with what Dr. Sidi mentioned above,
Candidates need to understand that consulting is a high turn over industry, and that, on average, 20% of consultants at a certain firm will leave yearly, therefore, there is a continuous need for new hires for firms to avoid lacking seasoned consultants in 5 years time.
Now to answer your question, obviously market needs play a major role in the hiring volume, with some regions doing better than others.
I would say that the market in North America and the Middle East are almost always the most lively,
Hope this answers your question,