Mills1 and 1000 Genomes Project2 (1kGP) dataset is a comprehensive catalog of insertion and deletion polymorphisms, offering a resource for understanding common genetic variations.
The specific version in use is accessible for download here as part of the Genome Analysis Toolkit (GATK) resource bundle in following files:
1: Mills RE, Luttig CT, Larkins CE, Beauchamp A, Tsui C, Pittard WS, Devine SE. An initial map of insertion and deletion (INDEL) variation in the human genome. Genome Res. 2006 Sep;16(9):1182-90. doi: 10.1101/gr.4565806; 2: The 1000 Genomes Project Consortium. A global reference for human genetic variation. Nature 526, 68–74 (2015). doi: 10.1038/nature15393