The data for the last days are likely not up-to-date then.
The heading says "Päiväkohtaiset tautitapaukset (näytteenottopäivän mukaan)" - which means
"Daily incidence (according to sampling date)", and since it takes a bit of time between the sample is taken and it is analyzed that likely means that all samples from yesterday and the days before are not yet analyzed, and those numbers will increase.