Fig. 3

Percentage (with 95% confidence interval) of major, intermediate and minor causes of elimination by period of year. The year was divided into four periods: 1 (1st January–31st March), 2 (1st April–30th June), 3 (1st July–30th September) and 4 (1st October–31st December). The causes of elimination have been grouped into “major causes” (causes of elimination with a percentage higher than 15%), “intermediate cause” (causes of elimination with values between 8 and 15%) and “minor causes” (elimination causes with values lower than 8%)