Reliable CCD statistics?

It seems that we are getting closer to the truth about CCD losses in the USA over the past year.

A survey by the Apiary Inspectors of America estimates that between 651,000 and 875,000 of the nation's 2.4 million honeybee colonies were lost over last winter. While most losses were from known causes, over one fourth were attributed to CCD.

So it seems that the figure might be 8-10% of the total population.