Update README.md

README.md

@@ -247,4 +247,5 @@ All the code and the resulting docker images in this project are subject to:
 The input data is subject to:
 - [Eurostat data](https://ec.europa.eu/eurostat/about-us/policies/copyright)
 - [BLS Terms of Service](https://www.bls.gov/developers/termsOfService.htm)
+- [Census Terms of Service](https://www.census.gov/data/developers/about/terms-of-service.html) This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.