All proprietary information obtained by the commission or the director from producers or handlers or any other source, and all lists of producers in the possession of the commission or the director are confidential and shall not be disclosed except when required by a court order after a hearing in a judicial proceeding regarding this chapter. Information on volume shipments, commodity value, and other related information which is required for reports to governmental agencies, financial reports made to the commission or aggregate sales and inventory information, and any other information which the handlers request from the commission to receive in total, excluding individual handler information, may be disclosed by the commission.