Pretty self explanatory but here are the numbers according to vgchartz

Wii U

2012-2.25 million

2013-3.15 million

2014-3.65 million

2015-3.45 million

2016-1.55 million

Switch

2017-3.50 million as of April 29.

Adding in May numbers easily puts Switch over any year for Wii U.

There's a chance that the Switch's first 10 months will be better than the Wii U's lifetime.

Poor Wii U. Loved it but not a lot of love shown worldwide.

Switch is a beast though.

I have no words... I only wish Iwata was here to see the fruits of his work.

It'll stop selling after the Zelda Mario Kart Splatoon 2 Mario hype dies down. 

Wii U - poor sales but amazing exclusives.

these damn artificial shortages!!!!!!

but then you'll have Pokemon, Animal Crossing, Monster Hunter, Xenoblade, Fire Emblem etc. etc. etc.

Considering this is both handheld and console succesor it's to be expected. But the fact it happened so soon just shows how bad Wii U did and how good Switch is doing.

What a beast!