"since_year","till_year","Total","Graphic"
"1200","1299","2",""
"1300","1399","5",""
"1400","1499","13",""
"1500","1599","41",""
"1600","1699","223","=="
"1700","1799","606","======"
"1800","1899","2856","============================="
"1900","1999","4608","=============================================="
"2000","2099","557","======"