http://www.techradar.com/news/nintendo-switch-outsells-wii-u-in-less-than-11-months

The Nintendo Switch has barely been on sale for a year, but it's already outsold the company's previous console, the Wii U. 

Impressively, this means the Switch has sold more units over an 11 month period than the Wii U managed in the five years it was on sale up until December 2017.