ADP is a company that provides software for companies to deal with payroll, taxes, tracking work hours and similar HR stuff. A small amount of Canadian companies use this software. ADP also reports how many Canadians are on payroll through a statistical analysis of the data they get from the companies which use ADP software. During the pandemic they reported that out of the almost 17 million Canadians on payroll over 9 million lost their job. They corrected this number to about 1 million. You either believe that the unemployment rate is 60% (like before the correction) or 8% (after the correction).