"since_year","till_year","Number","Graph"
"1400","1409","1",""
"1420","1429","1",""
"1450","1459","2",""
"1480","1489","2",""
"1500","1509","2",""
"1510","1519","1",""
"1520","1529","2",""
"1530","1539","1",""
"1540","1549","3",""
"1550","1559","2",""
"1560","1569","3",""
"1570","1579","1",""
"1580","1589","2",""
"1600","1609","5",""
"1610","1619","6",""
"1620","1629","3",""
"1630","1639","3",""
"1640","1649","1",""
"1650","1659","5",""
"1670","1679","1",""
"1680","1689","2",""
"1690","1699","6",""
"1700","1709","6",""
"1710","1719","3",""
"1720","1729","9",""
"1730","1739","6",""
"1740","1749","8",""
"1750","1759","6",""
"1760","1769","8",""
"1770","1779","8",""
"1780","1789","8",""
"1790","1799","7",""
"1800","1809","6",""
"1810","1819","7",""
"1820","1829","16","="
"1830","1839","13","="
"1840","1849","20","="
"1850","1859","10","="
"1860","1869","21","="
"1870","1879","14","="
"1880","1889","24","="
"1890","1899","18","="
"1900","1909","8",""
"1910","1919","9",""
"1920","1929","6",""
"1930","1939","9",""
"1940","1949","14","="
"1950","1959","14","="
"1960","1969","11","="
"1970","1979","6",""
"1980","1989","15","="
"1990","1999","16","="
"2000","2009","11","="
"2010","2019","7",""
"2020","2029","2",""