Over the last 10 years the population has grown at a rate of 5.5%. Most of the population () speaks German  (97.9%), with French being second most common ( 0.4%) and English being third ( 0.4%).
The passage states that over the last ten years, the population has increased at a rate of 5.5% on average.  It also highlights that German is the most spoken language, with 97.9% of the population speaking it. French comes in second at 0.4%, and English follows at 0.4%.