Larger than average discrepancies between yearly and monthly exports

[sophia-IV]

Comparing event counts between year, month and day data streams, historically there have been significant differences between yearly and monthly datasets where monthly and daily have been somewhat consistent. In most cases yearly < monthly activity which I assumed could be explained by dropped logs. However in 2020, yearly > monthly . Can you explain why these datasets might be so different and divergent from prior year trends?

For example:
select count(*) from githubarchive.year.2020;
892710157

select count(*) from githubarchive.month.2020*;
868383384

select count(*) from githubarchive.day.2020*;
870748296