International Emergency Economic Powers Act: Key Facts [Updated July 10, 2020] [infographic] [open pdf - 613KB]
From the Document: " In the 1970s, Congress enacted the National Emergencies Act (NEA) and IEEPA [International Emergency Economic Powers Act] to replace previous emergency authorities and place new limits on presidential emergency power.  Since the enactment of the NEA and IEEPA, Presidents have declared 67 national emergencies.  Since 1995, 40 national emergencies citing IEEPA have been declared, 9 have ended.  Presidents have declared national emergencies invoking IEEPA with respect to 35 countries as part of the U.S. sanctions regime.  IEEPA was used to continue enforcement of the Export Administration Act (EAA) upon its expiration 6 times for a total of 27 years. IEEPA authority is still used to continue certain export controls related to WMD [weapons of mass destruction]."
CRS Report for Congress, IG10012
Congressional Research Service: https://crsreports.congress.gov/