This is far more than what was made this year.
In a Q&A Summary of Nintendo's Financial Results Briefing for the second half of this fiscal year (October 2017-March 2018), Nintendo Representative Director Tatsumi Kimishima explains that Nintendo originally planned to produce 10 million Switch units this fiscal year (April 2017-March 2018). In other words, the Switch could beat the Wii U in under a year with a big holiday marketing push, and in all likelihood it'll eclipse it early in 2018.
The Switch has gone well beyond Nintendo's expectations, as the company only expected to sell about 10 million units in the first fiscal year. However, Nintendo's apparent willingness to increase the availability of Switch consoles makes the supply shortfalls of the NES and SNES Classics particularly confusing. That's more than predecessor Wii U sold in its entire life to date, but apparently even that torrent pace is too slow to meet the kind of future demand Nintendo is expecting.
From the day the Switch launched on March 3rd up through the end of September, Nintendo sold 7.6 million Switch consoles worldwide. Combined with sales from its launch month in March, that will bring it to a total of almost 17 million units in its 13 months of availability. That console shipped more than 101.6 million units. Wall Street Journal adds the company may increase these numbers depending on its performance this holiday season. Breath of the Wild's sales (of the game's Switch version), meanwhile, have surpassed 4.7 million; and Mario Kart 8 has sold more than 4.4 million copies.