The employer shall record, in an appendix to the single document:
1° Collective data useful for assessing individual exposure to the risk factors mentioned in Article L. 4161-1 in order to facilitate the declaration referred to in this article, where appropriate on the basis of the identification of jobs, professions or work situations included in an extended collective agreement or an approved branch professional reference document referred to in article L. 4161-2;
2° The proportion of employees exposed to the occupational risk factors referred to in article L. 4161-1, above the thresholds provided for in the same article. This proportion is updated as necessary when the single document is updated.