All proprietary information obtained by the commission or the secretary from producers or vintners, and all lists of producers in the possession of the commission or the secretary are confidential and shall not be disclosed except when required by a court order after a hearing in a judicial proceeding involving this chapter. Information on volume shipments, commodity value, and other related information that is required for reports to governmental agencies, financial reports made to the commission or aggregate sales and inventory information, and any other information which is requested from the commission, except individual producer or vintner information, may be disclosed by the commission.