"since_year","till_year","Anzahl","Graphik"
"1690","1699","3",""
"1700","1709","4",""
"1710","1719","2",""
"1720","1729","1",""
"1730","1739","3",""
"1740","1749","9",""
"1750","1759","9",""
"1760","1769","5",""
"1770","1779","20","="
"1780","1789","26","="
"1790","1799","21","="
"1800","1809","29","="
"1810","1819","33","=="
"1820","1829","45","=="
"1830","1839","35","=="
"1840","1849","42","=="
"1850","1859","35","=="
"1860","1869","36","=="
"1870","1879","31","=="
"1880","1889","44","=="
"1890","1899","27","="
"1900","1909","19","="
"1910","1919","20","="
"1920","1929","18","="
"1930","1939","12","="
"1940","1949","19","="
"1950","1959","11","="
"1960","1969","18","="
"1970","1979","23","="
"1980","1989","10","="
"1990","1999","14","="
"2000","2009","16","="
"2020","2029","2",""