From the Document: "The purpose of this letter is to provide an update on the overall status of the U.S. Department of Homeland Security's (DHS) implementation of GAO's [Government Accountability Office] recommendations and to call your personal attention to areas where open recommendations should be given high priority. In November 2019, we reported that on a government-wide basis, 77 percent of our recommendations made 4 years ago were implemented. DHS's recommendation implementation rate was 83 percent. As of March 2020, DHS had 390 open recommendations. Fully implementing all open recommendations could significantly improve DHS's operations."
Government Accountability Office: https://www.gao.gov/