Table:
|  | December 31, 2019 | December 31, 2018 |
| --- | --- | --- |
| Trade accounts receivable | 1,396 | 1,292 |
| Allowance for doubtful accounts | (16) | (15) |
| Total | 1,380 | 1,277 |
Paragraphs:
There was no material bad debt expense in 2019, 2018 and 2017. In 2019, 2018 and 2017, the Company’s largest customer, Apple represented 17.6%, 13.1% and 10.5% of consolidated net revenues, respectively, reported in the ADG, AMS and MDG segments.
In 2019, $75 million of trade accounts receivable were sold without recourse (nil in 2018).
Question:
What is the average Allowance for doubtful accounts?
Answer: (16+15) / 2 = 15.5