Platform yearly statistics
@ mention of reviewers`
@ObadaS @Didayolo`
A brief description of the purpose of the changes contained in this PR.
New function is added in the statistics script to generate yearly statistics of the platform.
Documentation
Documentation is updated here: https://github.com/codalab/codabench/wiki/Administrator-procedures#codabench-statistics
Issues this PR resolves
A checklist for hand testing
We need to test the result on test server to check if the statistics are correct
Checklist
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Code review by me -
Hand tested by me -
I'm proud of my work -
Code review by reviewer -
Hand tested by reviewer -
CircleCi tests are passing -
Ready to merge