I received a letter over a month ago from the US Department Health and Human Services (DHHS). They were very excited to announce that my household had been selected to conduct a National Survey on Drug Use and Health.

Here is the letter:
http://www.flickr.com/photos/89689736@N08/8196808230/
(I have leaflets and other information that accompanied this )

The letter said 200,000 interviewed and the leaflet says 70,000.
http://www.flickr.com/photos/89689736@N08/8196863866/

It further explains that this is the Federal Governments primary source of national data on the use of alcohol, tobacco, and illicit substances.

The survey also contains questions on health and illegal behaviors and other topics associated with substance use.

According to the letter approximately 70,000 individuals, 12 years old and older, will be randomly selected and asked to voluntarily participate.