"since_year","till_year","Number","Graph"
"1660","1669","1",""
"1700","1709","6",""
"1710","1719","6",""
"1720","1729","9",""
"1730","1739","4",""
"1740","1749","20","="
"1750","1759","24","="
"1760","1769","15","="
"1770","1779","28","="
"1780","1789","48","=="
"1790","1799","31","=="
"1800","1809","53","==="
"1810","1819","45","=="
"1820","1829","55","==="
"1830","1839","74","===="
"1840","1849","88","===="
"1850","1859","78","===="
"1860","1869","105","====="
"1870","1879","128","======"
"1880","1889","141","======="
"1890","1899","141","======="
"1900","1909","173","========="
"1910","1919","176","========="
"1920","1929","137","======="
"1930","1939","128","======"
"1940","1949","188","========="
"1950","1959","104","====="
"1960","1969","145","======="
"1970","1979","139","======="
"1980","1989","152","========"
"1990","1999","147","======="
"2000","2009","112","======"
"2010","2019","29","="
"2020","2029","8",""