This number was dug up by Digitimes which has been asking its chums in the semiconductor packaging and testing service industry.

The sources pointed out that the pre-orders for the iPhone X in some markets such as Taiwan, the US and Singapore, are not as strong as expected.

The poor iPhone X performance is unlikely to hurt Apple much. The markup on the phone is so high that Apple is still coining it in.  However, it does show that there is still a general slump in things Applish. 

Because of the iPhone X's weak performance, the upstream supply chain has been rumoured that Apple is planning three new smartphones for 2018 with two using OLED displays and one LCD display, and the 3D sensing functionality may be more broadly used in these devices.

Apple is also rumoured to adjust its pricing for iPhone devices in early 2018 and has even started preparing a prototype iPhone with the support of pre-5G features.

Whether or not that will be enough to save the iPhone, is hard to say.  People are generally starting to wake up that the iPhone is behind in technology terms and price.