"since_year","till_year","Total","Graph"
"1100","1199","3",""
"1200","1299","1",""
"1400","1499","1",""
"1500","1599","76","="
"1600","1699","612","======"
"1700","1799","1792","=================="
"1800","1899","1215","============"
"1900","1999","667","======="
"2000","2099","5",""