estuvieron aumentando
-they/you were increasing
Preterite progressiveellos/ellas/ustedesconjugation ofaumentar.

aumentar

Las tasas de interés hipotecarias estuvieron aumentando durante la mayor parte de 2018 antes de alcanzar su máximo en noviembre al 4.94%.
Mortgage interest rates had been on the rise for most of 2018 before reaching their peak in November at 4.94%.
Word of the Day
eyepatch