Ok I made a mistake. It is 80% of households in the developed world that owns a PC instead of 100%.
Now lets get back to the subject.
Share of households with a computer in developed countries 2005-2019 | Statista
In 2019, 79 percent of households in developed countries were estimated to have a computer at home, a similar figure to what had been recorded over the last 3 years.
www.statista.com