[BUG] x-axis of bioindicator ontweid gewicht looks wierd

[SanderDevisscher]

Describe the bug
As reported by @jimcasaer the x-axis of bioindicator ontweid gewicht looks a bit wierd.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'faunabeheer-dev.inbo.be'
2. Click on 'Ree'
3. Scroll down to 'bioindicator ontweid gewicht'
4. See error

Expected behavior
@jimcasaer do you want a continious x-axis without n-values?

Screenshots

Git SHA (after 0.3.1)
The sha of the version where you detected the bug. Can be by clicking on the app version (top right corner)

[mvarewyck]

Suggestion: Include amount as hover info and remove from axis + include all years instead of per 2 years.