In the centuries that followed, Portugal became heavily dependent on England as the main exporter of cod, and by the 1800s, the ingredient was something enjoyed only by the aristocracy. However, cod's popularity expanded in the 20th Century during the reign of Portuguese dictator António de Oliveira Salazar, who wanted to bring it back home. His "cod campaign", launched in 1934, looked to reignite Portugal's fishing (and drying) industry and instate cod as a national symbol. Thousands of Portuguese fishermen were sent to Canada and Greenland to fish for cod, with some bringing back up to 900 tonnes per boat.