In the following graphic, three data sets are layered on top of each other.
The lowest level shows if there is any data at all for this page and this year. This is coded in grey (no data available) or white (there are html-files in the dump from the archive).
Colors indicate which system has been detected. The shape indicates how the system has been found.
You can hover over the data points to read the information directly.
This graph only shows if and how many html pages are included in the delivery from the internet archive for the respective domain.
In addition, the graph is divided into two parts: whether systems were found or not.
Currently this section is static. It's always the data of 'Kölner Stadtanzeiger' visible.
Years marked only with an outline, the system could be found as the company existed. In the marked year, however, nothing was discovered in the current data set.
Lighter color indicates that the concrete date is unknown.