Character stats

I tried to call data from /characters/{character_id}/stats/
The problem is that it is returning (in my case) only 2016 and 2017 stats. 2018 stats are not showing up (it’s May, in the past data for the last year was published in January/ February).
Moreover will that property be updated during year? (So I can pull 2019 data during 2019, not in 2020)