Issue number 305 of the CIES Football Observatory Weekly Post ranks 80 top divisions worldwide according to the percentage of minutes by 21-year-old or younger players since the 2015/16 (or 2015) season. The lowest percentage among the five major European leagues was recorded in the English Premier League (7.1% of minutes), while the highest was measured in the French Ligue 1 (15.4%).

Two Baltic countries are at the top of the overall rankings: Estonia (31.1%) and Latvia (27.2%). The Slovenian top division complete the podium: 26.4%. The Dutch Eredivisie is the most competitive championship in the top 10 (8th, 23.8%). The highest figures for leagues in non-UEFA associations were observed in Panama (7th, 23.9%), Venezuela (13th, 22.0%) and Uruguay (20th, 18.0%).

Since 2015, Chinese Super League clubs fielded 21-year-old or younger players for the fewest percentage of minutes among all of the competitions surveyed: 3.9%. This very low proportion indicates that China is not yet ready to become a football power as local talents struggle to gain experience. The second lowest figure was recorded in the Turkish Süper Lig (4.1%).