How to analyze Contributor graph on gitlab graph screen while it is represent the commits number in decimal points?

How to analyze Contributor graph on gitlab graph screen while it is represent the commits number in decimal points?
On my gitlab graph page, there are multiple graph displayed on contributor screen which help to analyse the how many commits have been done by each user on particular day but on my gitlab page, it is displaying in decimal number.
Please help me to understanding this

screenshot is attached.
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