Vector frowned at her notes. "And then the percentage decreases slowly from there. But that doesn't make sense. Shouldn't that have happened eleven years after the end of the war? We're only starting to see the population uptick now, the first-years this year were a year or two old when the war ended." The endpoints were Hermione Granger (who would have been twenty-five months old when the Potters killed Voldemort) and Neville Longbottom (who would have been about fifteen months). So ... "Kids born after the war ended would be the ones born starting in November of 1981, those kids will be eleven next November, we won't see them until the year after next. So why the Muggleborns? Shouldn't that be the case everywhere?"