Yes, unpaid work was originally put on to the census of population in the early seventies, because that was actually the only vehicle available. Since then the generalized social survey has a module on time use, which is a much more appropriate way of looking at unpaid work and general time use.
There is data that came out in 2011 and there's another cycle coming out in 2016.
That's a more appropriate way of collecting that information, so that's available.