Tasa de Graduación y Retención / Graduation & Retention Rate Ponce Graduation and transfer out rates cohorte 2016-Ponce Graduation and transfer out rates cohorte 2016-PUCPR Retention Rate cohorte 2021-PUCPR Arecibo Graduation and transfer out rates cohorte 2016-Arecibo Retention Rate cohorte 2021-PUCPR Mayaguez Graduation and transfer out rates cohorte 2016-Mayaguez Retention Rate cohorte 2021-PUCPR