"since_year","till_year","Total","Graphic"
"200","299","1",""
"300","399","4",""
"400","499","2",""
"500","599","3",""
"600","699","2",""
"700","799","2",""
"800","899","3",""
"900","999","5",""
"1000","1099","3",""
"1100","1199","8",""
"1200","1299","1",""
"1300","1399","1",""
"1400","1499","1",""
"1500","1599","19",""
"1600","1699","112","="
"1700","1799","223","=="
"1800","1899","422","===="
"1900","1999","573","======"
"2000","2099","69","="