"since_year","till_year","Anzahl","Graphik"
"1850","1859","1",""
"1860","1869","1",""
"1870","1879","2",""
"1890","1899","1",""
"1900","1909","1",""
"1910","1919","13","="
"1920","1929","23","="
"1930","1939","18","="
"1940","1949","13","="
"1950","1959","15","="
"1960","1969","18","="
"1970","1979","23","="
"1980","1989","31","=="
"1990","1999","30","=="
"2000","2009","30","=="
"2010","2019","10","="
"2020","2029","9",""