Trade data from BACI to-be-used with regioinvent.

The dataset contains import and export data of traded goods corresponding to ecoinvent products from the BACI database (https://www.cepii.fr/CEPII/en/bdd_modele/bdd_modele_item.asp?id=37), as well as data used to estimation total production volumes from various sources. The only purpose of this dataset is to be used as an input to the Regioinvent Python package which can be found here: https://github.com/CIRAIG/Regioinvent v3.1 changes: New commodities added.