A steady decline …

„Approximately 13 percentage points more students in OECD countries reported in PISA 2018 than in PISA 2000 that they only read if they have to while about 8 percentage points more did it between PISA 2018 and PISA 2009. This decline, therefore, has been steady if not more pronounced in the last years.“
OECD (Hrsg.), 21st-Century Readers (2021), S. 79.