It's OK, the UK is "stagnating" as well;
http://www.bbc.co.uk/news/education-25187997
Having said that, there is variation between Scotland and England/Wales. According a news report I saw on TV, Scotland does better in Maths and English, but England/Wales do better at the Sciences.
http://www.bbc.co.uk/news/uk-scotland-25198792
Mike.