Do we offer historical data?
Currently, We don't offer historical data. This is because:
1) We haven't been offering data products for very long.
2) The Census data we use captures a snapshot in time based on what we know in the present and is not intended to be compared across time, there are statistical problems with doing so.
Here is the link where you can check all of our past data release dates and see the changes that have been made to each dataset: