It varies, like rank in JEE Advanced.
With the marks I scored in JEE Advanced 2017, my rank was supposed to be in the range of 5k-6k according to 2016 data, but I got… ahem, you get it right?
In 2016, the 20th guy got 219 marks;
whereas in 2017, the 1st rank got 209, and the 20th guy got 160.
As a general trend, a score above 250-270+ should land you under 20, but
Aim as much as you can.