> select count(distinct(sciper)) as usercount, date_format(`date`, "%Y") as year from massfacturation_old.jobs group by year;
+-----------+------+
| usercount | year |
+-----------+------+
|       160 | 2017 |
|       262 | 2018 |
|       165 | 2019 |
+-----------+------+
3 rows in set (0.00 sec)

> select count(distinct(sciper)) as usercount, date_format(`date`, "%Y") as year from massfacturation.jobs group by year;
+-----------+------+
| usercount | year |
+-----------+------+
|       170 | 2019 |
+-----------+------+
1 row in set (0.01 sec)