The Fire Marshal shall keep in his office a record of all fires occurring in this state and all the facts concerning same, including statistics as to the extent of such fires, the damage caused thereby, whether such losses were covered by insurance and, if so, in what amount. Such records shall be made daily from the reports made to him by his assistants under the provisions of this article. All such records shall be public, except any testimony taken in an investigation under the provisions of this chapter, which the Fire Marshal, in his discretion, may withhold from the public.