Which leagues are decided by a single goal?

Share of matches won by exactly one — the closest football gets to a measure of tension.

Devrî'l-Muhterifin el-Umânî (Umman) is the tightest: 56,1% of its matches are settled by a single goal.

Which leagues are decided by a single goal?
League	Won by one	Matches
1. Devrî'l-Muhterifin el-Umânî Umman	56.1%	132
2. Premier League Gana	53.9%	241
3. Ligue 2 Cezayir	52.1%	240
4. Superliga Arnavutluk	49.5%	182
5. Division d'Honneur Guadeloupe	48.4%	182
6. Azerbaycan Premyer Ligası Azerbaycan	47.4%	192
7. 1st Division Arnavutluk	45.8%	240
8. Ligue 1 Tunus	43.8%	240
9. Premier League Jamaika	43%	228
10. Primera B Metropolitana Arjantin	42.6%	420
11. A-League Avustralya	42.1%	140
12. Ligue 1 Cezayir	42.1%	240
13. Yunanistan Süper Ligi Yunanistan	41.7%	252
14. Primera D Arjantin	41.6%	320
15. Persha Liga Ukrayna	41.5%	306
16. Primera División Venezuela Venezuela	41.3%	317
17. Portekiz Süper Ligi Portekiz	41.3%	240
18. Birinci Dasta Azerbaycan	41.2%	182
19. Football League Two İngiltere	41.1%	557
20. Segunda División Venezuela	41.1%	258
21. Liga Nacional Honduras	41%	200
22. 1. Lig Türkiye	41%	310
23. 2nd Division - Group B Arnavutluk	40.9%	132
24. 3. Lig - Group 1 Türkiye	40.6%	342
25. Premier Lig Galler	40.5%	195
26. 3. Lig - Group 3 Türkiye	40.4%	342
27. Süper Lig Türkiye	40.3%	330
28. Ligue 2 Fransa	40.3%	380
29. Primera Division Guatemala	40.3%	390
30. HKFA 1st Division Çin Hong Kong ÖİB	40.2%	132
31. 1. Division Kazakistan	40.1%	272
32. Serie A Brezilya	40%	380
33. National 2 - Group D Fransa	40%	305
34. Ed-Devrî'l-Mısrî'l-Mümtaz Mısır	39.9%	143
35. Championnat National Fransa	39.5%	370
36. Eerste Divisie Surinam	39.3%	135
37. Championship İngiltere	39.1%	557
38. 2. Lig Türkiye	38.6%	272
39. La Liga İspanya	38.4%	380
40. Segunda División Profesional Uruguay	38.1%	168

Showing every competition. Major competitions only

League play only. Draws are not counted here — they are their own question.