In 2021, on average over the year, the volume of work paid by companies in the private sector remained 2.1% below its 2019 level. It fell back by 9.4% in 2020 compared to 2019, a fall on a scale unprecedented since the post-war period, to be likened to the drop in gross domestic product (GDP) by volume (–8.0%) or in production in the non-agricultural market branches (–9.6%)...