EBSCO released in October its annual projections for price increases to come in 2021. Their prediction is that "the overall effective publisher price increases for academic and academic medical libraries are expected to be (before any currency impact) in the range of two to three percent for individual titles and one to three percent for e-journal packages." The report is based on conversations with a variety of international content providers as well as historical data on pricing practices.
Note surprisingly, due to the impact of COVID-19, most public and academic libraries are expecting significant budget cuts in their acquisition budgets for books and journals.
The formal press release from EBSCO Information Services may be found here.