French explorer Jacques Cartier in his three voyages into the Gulf of St. Lawrence in the 1530s and 1540s conducted some of the earliest fur trading between European and First Nations peoples associated with sixteenth century and later explorations in North America. Cartier attempted limited fur trading with the First Nations in the Gulf of St. Lawrence and along the St. Lawrence River. He concentrated on trading for furs used as trimming and adornment. He overlooked the fur that would become the driving force of the fur trade in the north, the beaver pelt, which would become fashionable in Europe.  The earliest European trading for beaver pelts dated to the growing cod fishing industry that spread to the Grand Banks of the North Atlantic in the 16th century. The new preservation technique of drying fish allowed the mainly Basque fishermen to fish near the Newfoundland coast and transport fish back to Europe for sale. Drying fish enabled gathering greater yields, which justified the economic cost and time of long voyages across the Atlantic. The fisherman sought suitable harbors with ample lumber to dry large quantities of cod. This generated their earliest contact with local Aboriginal peoples, with whom the fisherman began simple trading.  The fishermen traded metal items for beaver robes made of sewn-together, native-tanned, beaver pelts. They used the robes to keep warm on the long, cold return voyages across the Atlantic. These castor gras in French (or "beaver coat" in English) became prized by European hat makers in the second half of the 16th century, as they converted the pelts to fur felt. The discovery of the superior felting qualities of beaver fur, along with the rapidly increasing popularity of beaver felt hats in fashion, transformed the incidental trading of fishermen in the sixteenth century into a growing trade in the French and later English territories in the next century.

Answer this question "What year was these trades origin happening?" by extracting the answer from the text above.
makers in the second half of the 16th century,