This is higher than the national average of 6.2%. It has a much higher proportion of people with tertiary qualifications than the national average. Rs 6,998, compared to the national average. This score is lower than the OECD average of 486. Kilowatt hours of energy per average load. Musical training in childhood correlates with higher than average IQ. In the species overall, males average around and females around . Cardiff experiences less rainfall than the average for Wales. Duration of average schooling has increased steadily. Also, at least four months must average above . Winter maxima average , with summer maxima averaging . The average high school grade point average (GPA) was 4.43. Winter maxima average in the Lowlands, with summer maxima averaging . The average high school grade point average (GPA) was 4.18. Summers have a July mean average of .