Error bars would be misleading, because this isn't a sampling error. These start with actual counts. The more important errors are systematic: the definitions of terms, the reporting mechanisms, etc.
Except that those things are constant from month to month, so deltas largely cancel them out.
The problem isn't in the size of the possible errors, but in understanding what those numbers mean and how they are gathered. That requires far more background reading.
Error bars would be misleading, because this isn't a sampling error. These start with actual counts. The more important errors are systematic: the definitions of terms, the reporting mechanisms, etc.
Except that those things are constant from month to month, so deltas largely cancel them out.
The problem isn't in the size of the possible errors, but in understanding what those numbers mean and how they are gathered. That requires far more background reading.