"since_year","till_year","Total","Graph"
"700","799","1",""
"800","899","15",""
"900","999","26",""
"1000","1099","17",""
"1100","1199","9",""
"1200","1299","5",""
"1300","1399","2",""
"1500","1599","14",""
"1600","1699","101","="
"1700","1799","134","="
"1800","1899","274","==="
"1900","1999","253","==="
"2000","2099","10",""