"since_year","till_year","Number","Graph"
"1660","1669","1",""
"1680","1689","3",""
"1690","1699","5",""
"1700","1709","1",""
"1710","1719","1",""
"1740","1749","2",""
"1750","1759","5",""
"1760","1769","4",""
"1770","1779","2",""
"1780","1789","3",""
"1790","1799","1",""
"1800","1809","3",""
"1810","1819","7",""
"1820","1829","8",""
"1830","1839","6",""
"1840","1849","8",""
"1850","1859","6",""
"1860","1869","11","="
"1870","1879","12","="
"1880","1889","14","="
"1890","1899","19","="
"1900","1909","15","="
"1910","1919","17","="
"1920","1929","23","="
"1930","1939","23","="
"1940","1949","13","="
"1950","1959","30","=="
"1960","1969","27","="
"1970","1979","20","="
"1980","1989","29","="
"1990","1999","15","="
"2000","2009","10","="
"2010","2019","10","="
"2020","2029","6",""