section 5103A of title 38, United States Code, that were identified by higher-level review and by the Board, disaggregated by type of error, such as errors relating to private records and inadequate examinations, and a comparison with errors committed by the Secretary in carrying out such duty with respect to appeals of decisions on legacy claims. (X) An assessment of the productivity of employees at the regional offices and at the Board, disaggregated by level of experience of the employees. (2) With respect to the processing by the Secretary of appeals of decisions on legacy claims, the following: (A) The average duration of each segment of the appeals process, disaggregated by periods in which the Secretary is waiting for a claimant to take an action and periods in which the claimant is waiting for the Secretary to take an action. (B) The frequency by which appeals lead to additional grant of benefits by the Secretary, disaggregated by whether the additional benefits are a result of additional evidence added after the initial decision. (C) The number and average amount of retroactive awards of benefits resulting from an appeal. (D) The average duration from filing a legacy claim with the Secretary until all appeals and remands relating to such legacy claim are completed. (E) The average number of times claimants submit to the Secretary different claims with respect to same condition, such as an initial claim, new and material evidence, or a claim for an increase in benefits. (F) An assessment of the productivity of employees at the regional offices and at the Board, disaggregated by level of experience of the employees. (G) The average number of days the duration of an appeal is extended because the Secretary secured or attempted to secure an advisory medical opinion under section 5109 of title 38, United States Code, or section 7109 of such title (as in effect on the day before the date of the enactment of this Act). (3) With respect to the processing by the Secretary of appeals of decisions on legacy claims