Figures from this source
- FiledPSA suspension of Value, Regular, Express service levels, announced 31 Mar 2021; goal to restore by 1 Jul 2021
- FiledPSA submissions surge, early March 2021, March 2021 (after 1 Mar price increase)
- FiledPSA statement on submission levels after surge, 31 Mar 2021
- FiledPSA March 2021 price increase, 1 Mar 2021