For details on the origin and quality of a statistic, please reference the information box located directly underneath the statistic. This box includes all available information on the data provided by the source.
More Information about the sources of statistics
The data is gathered from over 22,500 sources, including studies, scientific journals, official communications, trade reports, books, and other relevant statistical publications. You can find ‘Source’ and ‘More Information’ in the information boxes next to a specific statistic.
More Information about the sources of statistics
You can find information about the release/publication date and the period in which the data was collected in the ‘Source‘ and ‘More Information’ boxes next to the statistic.
For most topics, only the latest statistics are published. If you are searching for statistics on a particular time period, you may sort the results by clicking "date of publication" in the "sort by" filter located directly underneath the search field. You may also filter using the options on the lower left of the search results. The most recent statistics will be presented first, as well as information on the content and age groups of the data (for example, Pennsylvania, ages 18-24). Additional information may be found in the "More Information" box next to the statistic.
We proceed like other comparable editorial or scientific publications, e.g. specialist magazines, compendia, or encyclopedias. All data are researched, assessed, selected, and processed. In contrast to other traditional publication types, however, there is no textual description. Instead, only the data themselves are quoted, and detailed information on the source of the data is provided. In the case of online sources, the source of the data is usually not only indicated but can also be accessed directly via a link. As with other editorial offers, some of the researched content is available for free and some can only be accessed by paying users. If you have any questions with regard to data publication, please contact [email protected].
Yes, for all studies, the information is first evaluated before publication.
Not all studies are currently available with evaluated and analyzed results. The results of some surveys must first be calculated based on primary data – for example, oversampling, which may cause some surveyed groups to be disproportionately represented. Therefore, some calculations and analysis are conducted in cooperation with the Department of Marketing and Media Management of the University of Hamburg. This cooperation ensures the quality of information according to widely accepted and recognized scientific standards.
Below each statistic, you can find information as to who has published the above data, who was surveyed in the process of collecting the data and what the respective group of respondents was questioned about (e.g. aged 18 or over, Germany). You can use the buttons "Description", "Source" and "More info" to show or hide detailed information on a particular statistic.
More information about our sources.