570 is not the number of those who passed the exams. It's the number of candidates called for the 1st phase of the interview. I can roughly guess around 5-6  candidates each day as it takes about 40 - 60 minutes for each interview. I know of one session where only 5 candidates were called for the interview on that particular day. FYI sometimes interviews are not carried out every day within the date given. It can be only 1 or  2 days per week depending on the number of candidates in each state. If that particular state has  many candidates, the interview might be carried out everyday of the week.

I've failed 5 exams, 2 PAC an 2 interview before... Dont give up if this is really ur dream..