ノルウエー政府統計局 2010.07.01
Throughput varies markedly between pupils who enter upper secondary education at the age of 16, and those who start when they are 17 years or older. Eighty-four per cent of pupils who started a basic course at the age of 16 had completed general education within five years, compared with 48 per cent of those who started aged 17 or older.