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 (Brasil) is the most uniform: 72,2% 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 Brasil	72.2%	704
2. Super Liga Serbia	68.7%	483
3. Primera División Peru	56.5%	542
4. Liga Profesional Saudi Arab Saudi	53.1%	480
5. Egyptian Professional League Mesir	52.9%	588
6. Liga Super Yunani Yunani	52.1%	484
7. Serie A Brasil	50.9%	754
8. Liga Super Turki Turki	49.2%	824
9. TFF 1. Lig Turki	48.3%	590
10. Liga Utama Sepak Bola Amerika Serikat Amerika Serikat	48.1%	634
11. HNL Kroasia	43.1%	355
12. 1. Division Siprus	39.8%	462
13. First League Bulgaria	39.4%	426
14. Czech Liga Ceko	38%	610
15. Ekstraklasa Polandia	37.4%	478
16. Copa Sudamericana Internasional	37.1%	202
17. NB I Hungaria	36.8%	272
18. Liga Pro Uni Emirat Arab Uni Emirat Arab	36.7%	264
19. 3. Fußball-Liga Jerman	35.6%	756
20. Super Liga Slovakia	35.5%	282
21. Chilean Primera División Cile	35.4%	602
22. Liga Champions Elit AFC Internasional	35%	240
23. Indian Super League India	34.3%	230
24. Liga Utama Rusia Rusia	34.3%	478
25. Segunda División Spanyol	32.2%	936
26. Piala Libertadores Internasional	31.9%	307
27. 1. SNL Slovenia	30.9%	249
28. Fußball-Bundesliga Jerman	30.8%	616
29. Ligue 2 Prancis	30.5%	764
30. Liga Utama Belarus Belarus	30.2%	430
31. 2. Fußball-Bundesliga Jerman	29.9%	616
32. Liga Eropa UEFA Internasional	29.1%	722
33. Liga Champions UEFA Internasional	28.7%	348
34. Allsvenskan Swedia	28.5%	484
35. Liga Profesional Argentina Argentina	28.5%	246
36. Liga Negara UEFA Internasional	28.3%	336
37. Championship Inggris	27.9%	1.113
38. Liga MX Meksiko	27.2%	684
39. Liga Utama Inggris Inggris	26.8%	760
40. Liga Nasional Sepak Bola Rusia Rusia	26.7%	828

Showing every competition. Major competitions only

Exact formation as recorded.