In the first cycle of PIAAC, three rounds of data collection have been completed to date. Twenty-four countries participated in the first round (2011/12), nine additional countries joined the second round (2014/15). A third round included five countries (Ecuador, Hungary, Kazakhstan, Mexico, Peru as well as the United States which is carrying out an additional survey round). Data from the first round was published in 2013, the data from the second round was published in 2016. The data from the third round was released in 2019.