Ok. I will do the calculation for first draw in January, assuming that it will happen on the 8th, @hunnysaini :)
So, by 8th January, the CRS distribution in the pool will be approximately:
601-1,200=1,491(71x21days)
451-600=15,569(11,474+4,095(195x21d)
441-450= 9,304(9,241+63(3x21days))...