How were 2017 numbers by comparison? Because I expect the gap between PS4 and the rest to have been even larger in 2017 than in 2018.
Edit: According to a post in the link, Switch total sales are at 730K, meaning Switch sold 340K last year, so an almost 15% increase over last year.
Here's the post in question, with totals for all platforms, even older ones:
PS3 - 3,000,000
Pretty sure 300k has been the number used for Spain in 2017. Not sure where the poster gets 340k from.