Why didn't Apple release iPhone 7 sales numbers?

For the first time since 2008, the year Apple released the second version of its now iconic iPhone smartphone, the company chose not to release initial sales numbers for the phone within a few of days — or even weeks — of a new iPhone launch. 
In July, 2008, for example, Apple said it had sold a million iPhone 3G phones, three days after the device went on sale. Again, in 2009, the company announced iPhone 3GS sales numbers three days after its launch. And in 2010. And 2011. An