looking for yield of herbs?

I am trying to find out the general yield of various herbaceous plants over a given time (measured in fresh ounces or pounds, per month or year, per plant)

The plants are:

1. Basil

2. Cilantro

3. Dill

4. Mint

5. Oregano

6. Parsley

Obviously, these figures vary from species to species, but a ballpark figure is acceptable - I have seen that Basil can produce a pound per square foot over the course of 3 months...but that seems like a lot.

Please cite sources