less than 100000 70%
100k-200k 20% (100k-130k 10%, 130k-200k 10%)
200k-300k 7%
above 500k less than 1%
according to the Harvard data, 53% from 〉200k families。 14% from 130k-200k familes。29% from 25k to 130 k families。 The percentage between 100k to 130k was not given, but you can estimate to be at least 29*30/(130-25)=7%。 Actually the number should be higher because the higher the income, the more likely to be admitted。
So my estimate of student from 100k-200k families at Harvard is 14+7=21%。