I am looking for statistical information on drop shipping. I have been searching for stats that relate to the drop shipping industry, how much it has grown, estimated number of e-comemrce stores, etc. I have searched on many of the major ecom stats sites , but it has yet yielded any information. I have even tried to contact a few drop shipping providers themselves, but many of the providers I attmepted to contact gave me a cookie cutter answer or were not available.

Any information or a point in the right direction would be helpful.

Thanks