This is evident from relative grades of boys and girls which were rather stable for the cohorts studied. The average boy ranked about 43 in the GPA percentile distribution while the average girl ranked about 54 or 55. From Figure 5, which shows the fraction of boys in the five quintile groups as well as among those that do not complete compulsory school, it is very clear that boys are over represented in the lower quintiles, while girls are strongly over represented in the top quin-tiles.