"since_year","till_year","Number","Graph"
"1620","1629","1",""
"1680","1689","1",""
"1690","1699","1",""
"1710","1719","1",""
"1730","1739","2",""
"1740","1749","1",""
"1750","1759","3",""
"1760","1769","2",""
"1770","1779","7",""
"1780","1789","10","="
"1790","1799","10","="
"1800","1809","7",""
"1810","1819","11","="
"1820","1829","23","="
"1830","1839","17","="
"1840","1849","29","="
"1850","1859","38","=="
"1860","1869","64","==="
"1870","1879","74","===="
"1880","1889","54","==="
"1890","1899","69","==="
"1900","1909","89","===="
"1910","1919","118","======"
"1920","1929","96","====="
"1930","1939","94","====="
"1940","1949","124","======"
"1950","1959","113","======"
"1960","1969","98","====="
"1970","1979","142","======="
"1980","1989","161","========"
"1990","1999","121","======"
"2000","2009","127","======"
"2010","2019","71","===="
"2020","2029","16","="