The value
- 45:55 (March 2015); 45:55 (May 2016); 35:65 (March 2017)
Where it comes from
Japanese-language document, 2017 The Pokémon Company (Wayback capture of corporate site) · 28 November 2017 Open the original ↗
The line in the source
累計市場規模の国内・海外の比率：国内35%、海外65% [gloss: Split series is for all-business cumulative market size (4.4, 4.8, 6兆円以上); page dropped from the archive (404) from 2018-02 until the 2020 redesign, and the 2020+ page carries no split at all. Not a card-print split.]