 from 0.00 to 00% by weight, preferably from 0.00 to 00% by weight, more preferably from 0.0 to 00% by weight, even more preferably from 0.00 to 0.0% by weight most preferably from 0.0 to 0% by weight, even most preferably from 0.00 to 0.0% by weight. The level of residual monomers in the water-absorbent polymer 