Ranking of countries by percent of people who take paternal leave
Ranking of countries by ~
世界の〜ランキング
例えば平均の身長ならRanking of countries by average heightと言います。
percent of people who take paternal leave
育休取得率
paternal leave acquisition rateという直訳的な表現でも通じますがなんとなくあまり聞いたことないです。
Ranking of countries by percent of people who take paternal leave
(世界の)育休取得率のランキング
ご参考になれば幸いです!