"since_year","till_year","Number","Graph"
"1600","1609","1",""
"1660","1669","1",""
"1680","1689","4",""
"1690","1699","4",""
"1700","1709","10","="
"1710","1719","9",""
"1720","1729","8",""
"1730","1739","12","="
"1740","1749","10","="
"1750","1759","10","="
"1760","1769","18","="
"1770","1779","14","="
"1780","1789","16","="
"1790","1799","10","="
"1800","1809","7",""
"1810","1819","18","="
"1820","1829","21","="
"1830","1839","20","="
"1840","1849","14","="
"1850","1859","18","="
"1860","1869","19","="
"1870","1879","23","="
"1880","1889","24","="
"1890","1899","32","=="
"1900","1909","17","="
"1910","1919","28","="
"1920","1929","24","="
"1930","1939","27","="
"1940","1949","32","=="
"1950","1959","17","="
"1960","1969","34","=="
"1970","1979","32","=="
"1980","1989","36","=="
"1990","1999","23","="
"2000","2009","17","="
"2010","2019","23","="
"2020","2029","2",""