Neymar's key passes are
'14 - Jesus in the 6 yard box(L). Shot blocked.
'51 - Coutinho outside the box(L). Shot blocked.
'61 - Costa inside the box (R). Shot saved.
'63 - Coutinho outside the box(C). Shot blocked.
'77 - Firmino inside the box (C/L). Shot missed.
'83 - Coutinho inside the box (C). Shot missed.
'93 - Firmino header from corner from about 9 yards (C). Shot missed.
So two of them were basically just giving the ball to Coutinho outside the box. The other 5 are all legitimate created chances. Completing a pass in the 6 yard box is an event raring that scoring a goal in football. It is the most well defended space on the pitch and the margins for error are tiny.
Anyway, ignoring all of this, I tend to use xa to tell me the value of chances being created. Because that is putting those Coutinho shots outside the box at 0,01 (i.e. you created nothing) and puts the pass he made for the Firmino goal at 0,92 (you created a chance that is an almost certain goal).
So his xA numbers the last 3 seasons are:-
Ligue 1 2017/18 xA/90 = 0,62
La Liga 2016/17 xA/90 = 0,36
La Liga 2015/16 xA/90 = 0,53
To put those numbers into perspective - De Bruyne, Coutinho and Ozil were the three highest in this metric in the Premier League last season all ranging between 0,38-0,39.