"since_year","till_year","Number","Graph"
"190","199","1",""
"210","219","1",""
"1570","1579","1",""
"1590","1599","1",""
"1600","1609","1",""
"1610","1619","1",""
"1620","1629","10","="
"1630","1639","13","="
"1640","1649","6",""
"1650","1659","2",""
"1660","1669","9",""
"1670","1679","11","="
"1680","1689","23","="
"1690","1699","17","="
"1700","1709","15","="
"1710","1719","20","="
"1720","1729","30","=="
"1730","1739","29","="
"1740","1749","34","=="
"1750","1759","26","="
"1760","1769","31","=="
"1770","1779","37","=="
"1780","1789","50","==="
"1790","1799","49","=="
"1800","1809","82","===="
"1810","1819","112","======"
"1820","1829","127","======"
"1830","1839","203","=========="
"1840","1849","282","=============="
"1850","1859","373","==================="
"1860","1869","494","========================="
"1870","1879","504","========================="
"1880","1889","633","================================"
"1890","1899","732","====================================="
"1900","1909","889","============================================"
"1910","1919","1054","====================================================="
"1920","1929","1137","========================================================="
"1930","1939","1370","====================================================================="
"1940","1949","1395","======================================================================"
"1950","1959","1379","====================================================================="
"1960","1969","1634","=================================================================================="
"1970","1979","1685","===================================================================================="
"1980","1989","1731","======================================================================================="
"1990","1999","1775","========================================================================================="
"2000","2009","1852","============================================================================================="
"2010","2019","1491","==========================================================================="
"2020","2029","413","====================="