Why do we have a census count every ten years and does it really matter? The question popped into my head while reading a fascinating article by Tanzina Vega of the New York Times: Census Considers How to Measure a More Diverse America – about the preparations for the 2020 census and the challenges on how best to measure diversity.
Representatives and direct Taxes shall be apportioned among the several States which may be included within this Union, according to their respective Numbers, which shall be determined b adding to the whole Number of free Persons, including those bound to Service for a Term of years, and excluding Indians not taxed, three fifths of all other Persons. The actual Enumeration shall be made…within every subsequent Term of ten Years, in such Manner as they shall by Law direct.
Since the census is enumerated in the Constitution it is clearly a political activity and as you can see by the 3/5 clause and the exclusion of “Indians not taxed” it has its pitfalls and has continued so every ten years since then.