The net primary enrolment rate in 2010-11 was estimated to have been only 84.61%, indicating that not all primary school students remained until successfully completing primary school at the end of grade 5. The main loss occurred during the first two years of primary school, mainly for reasons of affordability and access. By the end of the primary school years, only about 70% students who commenced in primary school five years earlier remained enrolled. The transition from primary to secondary school brought about a further loss. By grade 6 (the first year of secondary), only about 50% of students who commenced primary school six years earlier remained enrolled. The loss 68 ASEAN STATE OF EDUCATION REPORT 2013 continued, and by grade 10 only 28.6% of students who commenced in primary school 10 years earlier remained enrolled. Between grade 10 and grade 11, there was further significant loss, and by the final year of secondary school only 23.9% of the students who commenced primary school 11 years earlier remained enrolled