Enable multiple loads from different years

[bpulluta]

Please check if the PR fulfills these requirements

• [ ] CHANGELOG.md is updated
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)
• [ ] Any new Django model inputs have also been added to job/test/posts/all_inputs_test.json

What kind of change does this PR introduce?

(Bug fix, feature, docs update, ...)

What is the current behavior?

(You can also link to an open issue here)

What is the new behavior (if this is a feature change)?

Does this PR introduce a breaking change?

(What changes might users need to make in their application due to this PR?)

Other information: