"since_year","till_year","Number","Graph"
"1570","1579","2",""
"1580","1589","6",""
"1590","1599","4",""
"1600","1609","11","="
"1610","1619","14","="
"1620","1629","49","=="
"1630","1639","38","=="
"1640","1649","45","=="
"1650","1659","35","=="
"1660","1669","69","==="
"1670","1679","99","====="
"1680","1689","74","===="
"1690","1699","94","====="
"1700","1709","74","===="
"1710","1719","98","====="
"1720","1729","99","====="
"1730","1739","94","====="
"1740","1749","95","====="
"1750","1759","111","======"
"1760","1769","123","======"
"1770","1779","112","======"
"1780","1789","100","====="
"1790","1799","82","===="
"1800","1809","111","======"
"1810","1819","74","===="
"1820","1829","102","====="
"1830","1839","86","===="
"1840","1849","72","===="
"1850","1859","81","===="
"1860","1869","56","==="
"1870","1879","64","==="
"1880","1889","60","==="
"1890","1899","56","==="
"1900","1909","41","=="
"1910","1919","54","==="
"1920","1929","37","=="
"1930","1939","49","=="
"1940","1949","53","==="
"1950","1959","22","="
"1960","1969","29","="
"1970","1979","41","=="
"1980","1989","51","==="
"1990","1999","33","=="
"2000","2009","39","=="
"2010","2019","37","=="
"2020","2029","26","="