This is a good point. We know that the periods of time that they conducted their tests must be finite because there is a year between them. We also know that the tests happened in August

Their non-response rates fell from 31 percent in August 2024 to 0 percent in August 2025

Was it a day or a week or a month? This matters greatly, and you can tell that I’m not deliberately misunderstanding simple phrases that are not difficult to understand because