“The quadrennial international interlibrary loan survey is one of the fundamental, core charges of the American Library Association (ALA) Reference & User Services Association (RUSA) Sharing and Transforming Access to Resources Section (STARS) International ILL Committee. The survey was first undertaken in 2007, with the current (2023) survey being the fifth iteration. The 2023 survey was distributed globally in collaboration with the International Federation of Library Associations and Institutions (IFLA) Document Delivery and Resource Sharing Section (DDRS), and was the first survey to be made available in all seven official IFLA languages (i.e., Arabic, Chinese, English, French, German, Russian, and Spanish). The 2023 survey instrument utilized the Qualtrics platform and was built upon the 2019 and 2015 instruments, with the majority of questions from those prior surveys retained in order to facilitate longitudinal comparison.” – quoted here
You can access the 2023 Executive Summary here and here.
Additionally, you can find a slidedeck on the survey, Navigating the Global Landscape of International Interlibrary Loan: Insights and Tools from the ALA RUSA STARS International ILL Committee, authored by Kabel Stanwicks, Joanne McIntyre, and lapis cohen, here.

