Time course of notifications, by year of diagnosis ascertainment or certification. Dataset: Subset 1; Origin of notifications: Regions using the record structure with the Date of diagnosis Ascertainment (AD) and regions using the record structure with the Date of diagnosis Certification (CD); Selection of records: Records with valid diagnosis ascertainment or certification date; Total records: 115,575 (AD records) and 121,854 (CD records, including those from Lombardia, Piemonte, Sardegna, and Val d’Aosta). Data are expressed as percentage of the total regional notifications (by region of residence) to better compare the progress of AD or CD notifications from regional populations with different dimensions. Absolute numbers of yearly notifications per region of residence are reported in Table S4.