Dec. 31,	Dec. 31,
$ millions	2018	2017
Cash and cash equivalents	$1,320	$913
Trade receivables*	2,714	3,229
Other receivables**	893	1,002
Inventories, net	3,110	3,068
Other current assets	1,087	811
Total current assets	$9,124	$9,023
Total assets	$75,275	$75,548

* (net of allowances of $48 at 2018 and $60 at 2017) **(net of allowances of $56 at 2018 and $118 at 2017)

e. What percentage of trade receivables does the company deem uncollectible as of yearend 2018?

f. Based on the analysis above, in which year does the company have higher quality trade receivables?