Where is 4-2-3-1 the default?

Share of line-ups set out as 4-2-3-1 — the most common shape in football, and in some leagues close to the only one.

Serie B (Brazil) is the most uniform: 72.1% of its line-ups are 4-2-3-1.

Where is 4-2-3-1 the default?
League	4-2-3-1	Line-ups
1. Serie B Brazil	72.1%	675
2. Pro League Saudi Arabia	61.7%	446
3. Primera A Colombia	61%	847
4. Süper Lig Türkiye	60.4%	604
5. Super League 1 Greece	59.8%	470
6. 1. Lig Türkiye	58.2%	328
7. Premier League Egypt	58.2%	466
8. Major League Soccer United States	47.1%	786
9. Serie A Brazil	46.5%	722
10. Primera División Peru	46%	554
11. Segunda División Spain	42.2%	905
12. CONMEBOL Libertadores International	40.5%	294
13. Championship England	39.9%	1,114
14. Ekstraklasa Poland	38.7%	582
15. Primera División Chile	37%	378
16. Premier League Russia	36.2%	470
17. 3. Liga Germany	36.1%	618
18. Ligue 2 France	36.1%	560
19. Czech Liga Czechia	34.8%	508
20. First League Bulgaria	32.8%	366
21. CONMEBOL Sudamericana International	32.5%	206
22. Liga MX Mexico	31.5%	550
23. Premiership Scotland	31.2%	356
24. Ligue 1 France	30.3%	558
25. Allsvenskan Sweden	29.7%	482
26. AFC Champions League Elite International	29.2%	288
27. Liga I Romania	28.3%	467
28. Super League Switzerland	27.7%	364
29. UEFA Champions League International	26.9%	420
30. Primeira Liga Portugal	25.9%	610
31. Jupiler Pro League Belgium	25%	452
32. Premier League England	24.5%	760
33. Copa del Rey Spain	23.8%	210
34. 2. Bundesliga Germany	22.9%	612
35. FA Cup England	22%	295
36. 2. Liga Austria	21.2%	208
37. UEFA Europa League International	20.9%	1,022
38. League One England	20.7%	796
39. La Liga Spain	19.1%	760
40. Bundesliga Austria	18.5%	390

Showing every competition. Major competitions only

Exact formation as recorded.