This section displays statistics for different periods, based on files analyzed by the technology SandBox, so it is important to remember that these do not show the activity of the malware on a global level.
Generally the malware statistics come from various sources, including e-mail service operated by aVtomic.
Supposedly the samples sent for analysis to SandBox, are malware that aren’t detected by the detected by current antivirus products. The new malware is so often represented in the statistics (Which is correct and how it should be).
What statistics can indicate, by the way, are the trends in the techniques used by malware authors. It can be seen in a given period of time if, for example, malware using botnet is growing or less than other types.