Wrong Y-axis labels on downloaded timeline graphs

[ncarazon]

Describe the bug

Question where this issue reproduced: https://www.metaculus.com/questions/42852/change-in-us-stem-bachelors-relative-to-2024-25/

Observed behaviour:

Downloaded graph has 0% - 100% axis, while the actual graph has -50 - 100

Expected behaviour:

Downloaded graph has correct axis labels