"Provide a retrieval date . . . when citing an unarchived (i.e., not stable) work that is likely or meant to change. Including this date indicates to readers that the version of the work they retrieve may be different from the version you used."
(Publication Manual of the American Psychological Association, 2020, p. 290)
Example:
Statistics Canada. (2020, March 19). Canada's population clock (real-time model). Retrieved June 15, 2020, from https://www150.statcan.gc.ca/n1/en/catalogue/71-607-X2018005
Narrative citation: Statistics Canada (2020)
Parenthetical citation: (Statistics Canada, 2020)