Avalonian advances in mechanized farming and food storage cause the farming of grains to require less and less manpower; as a result, more people leave farmlands and enter into other businesses including commerce. Builders in Avalonia's port cities improve both dry and wet docks to match this influx of merchants. Raw materials still make up the bulk of Avalonian imports, to fuel heavy industry, but increasing is the importation of foreign luxuries like liquors, art, literature, religious artifacts; you produce no luxury goods to speak of, so I guess I'll take your cultural identities.