"since_year","till_year","Total","Graphic"
"1000","1099","9",""
"1100","1199","14",""
"1200","1299","3",""
"1300","1399","3",""
"1400","1499","7",""
"1500","1599","30",""
"1600","1699","272","==="
"1700","1799","1647","================"
"1800","1899","2697","==========================="
"1900","1999","2808","============================"
"2000","2099","155","=="