This website uses the open-source analysis tool PIWIK ( to generate statistical evaluations about the use of this website. We thus have the possibility to optimize the website for you and make it more visitor-friendly. PIWIK stores the collected data (e.g. time, requested pages, browser used, operating system) in a database. The evaluations generated using PIWIK are completely anonymous and cannot be used for the identification of invididual persons. IP addresses are made illegible before reaching the database in order to comply with statutory regulations. A linking of the stored data with other data sources or transmission to third parties does not occur.