Progress was more promising at secondary school level, where the proportion of 18-year-olds achieving NCEA Level 2 edging up 2.1 per cent to 83.3 per cent.
The Government is now within reaching distance of its target to get 85 per cent achievement next year.
However, the long-standing gap in achievement between genders increased slightly, with 85.8 per cent of females getting NCEA Level 2 (up 2.4 per cent), compared to 81 per cent of males (up 2 per cent).
Parata said it was a significant achievement to have 51,299 18-year-olds reach the standard.
"That's around 38,000 more young people achieving the minimum qualification for success than if the achievement rate had remained at the level it was when we came into Government in 2008."
And the final results showed 71.1 per cent of Maori 18-year-olds achieved Level 2 (up 3.4 per cent), 77.6 per cent of Pasifika (up 2.6 per cent), 87.3 per cent of Pakeha (up 2.2 per cent) and 88.8 per cent of Asian students (a fall of 0.2 per cent).