This release contains the associated analysis of the state and evolution of empirical research in requirements engineering, based on the publications of the research track of IEEE International Requirements Engineering Conference (1994 - 2022). This analysis is part of the paper "O. Karras: KG-EmpiRE: A Community-Maintainable Knowledge Graph for a Sustainable Literature Review on the State and Evolution of Empirical Research in Requirements Engineering, In Proceedings of the 2024 IEEE 32nd International Requirements Engineering Conference (RE'24).".