You alone in Europe are not ancient oh ChristianityThe most modern European is you Pope Pius XAnd you whom the windows observe shame keeps youFrom entering a church and confessing this morningYou read the prospectuses the catalogues the billboards that sing aloudThat's the poetry this morning and for the prose there are the newspapersThere are the 25 centime serials full of murder mysteriesPortraits of great men and a thousand different headlines("Zone")

Do billboard salesmen record their sales on charts? If so, who's at the top of the billboard charts for billboard sales?