5.12 Search the Internet for the number of overnight stays for the Swiss holiday destinations Grison, Lucerne/Lake Lucerne, Berne upper country and Valais for the years 2005 to 2019 at the Swiss Federal Statistical Office. Plot the development of overnight stays using a line chart. We go into more detail, standardize the figures to the year 2008 (value 2008 equals 100) and redraw the line chart (this is already advanced). Describe briefly in a paragraph what is striking.