I proudly drank Yaucono coffee, too. Until a Puerto Rican friend pointed out that Yaucono isn't actually Puerto Rican! She sent me a graphic that shows the coffee brands that are grown in Puerto Rico, but I can't figure out how to attach it, so I'll write it for you, just in case you are looking for 100% Puerto Rican coffee.
Rioja, Alto Grande, Crema, Cafe Rico, Yaucono and Adjuntas brands are not 100% Puerto Rican.
These coffees are listed as 100% Puerto Rican: Cafe Altura, Cafe Las Marias, Cafe Florinata, Cafe Cibales, Cafe Loreno, Cafe Hayuya (with an "H"), Cafe Oro, Cafe D'Roui, Mami, Aroma del Cielo.
I verified with Yaucono that it is not 100% Puerto Rican, and I verified that Mami is. But I have no personal knowledge of the others.
Joy