Municipalities with more than 20,000 voters	Data	Total
Vitoria-Gasteiz (Álava)	Postal vote processed	8,144
Vitoria-Gasteiz (Álava)	voters	183,634
Vitoria-Gasteiz (Álava)	percentage	4.43
Eibar (Guipúzcoa)	Postal vote processed	1,323
Eibar (Guipúzcoa)	voters	24,837
Eibar (Guipúzcoa)	percentage	5.33
Irun (Guipúzcoa)	Postal vote processed	1,555
Irun (Guipúzcoa)	voters	47,747
Irun (Guipúzcoa)	percentage	3.26
Errentería (Guipúzcoa)	Postal vote processed	938
Errentería (Guipúzcoa)	voters	33,648
Errentería (Guipúzcoa)	percentage	2.79
Donostia-San Sebastian (Guipúzcoa)	Postal vote processed	9,300
Donostia-San Sebastian (Guipúzcoa)	voters	153,852
Donostia-San Sebastian (Guipúzcoa)	percentage	6.04
Barakaldo (Vizcaya)	Postal vote processed	3,044
Barakaldo (Vizcaya)	voters	83,876
Barakaldo (Vizcaya)	percentage	3.63
Basauri (Vizcaya)	Postal vote processed	1,607
Basauri (Vizcaya)	voters	40,401
Basauri (Vizcaya)	percentage	3.98
Bilbao (Vizcaya)	Postal vote processed	18,353
Bilbao (Vizcaya)	voters	302,021
Bilbao (Vizcaya)	percentage	6.08
Durango (Vizcaya)	Postal vote processed	938
Durango (Vizcaya)	voters	20,780
Durango (Vizcaya)	percentage	4.51
Galdakao (Vizcaya)	Postal vote processed	831
Galdakao (Vizcaya)	voters	24,544
Galdakao (Vizcaya)	percentage	3.39
Getxo (Vizcaya)	Postal vote processed	4,715
Getxo (Vizcaya)	voters	68,953
Getxo (Vizcaya)	percentage	6.84
Leioa (Vizcaya)	Postal vote processed	855
Leioa (Vizcaya)	voters	23,216
Leioa (Vizcaya)	percentage	3.68
Portugalete (Vizcaya)	Postal vote processed	1,939
Portugalete (Vizcaya)	voters	45,312
Portugalete (Vizcaya)	percentage	4.28
Santurtzi (Vizcaya)	Postal vote processed	1,591
Santurtzi (Vizcaya)	voters	41,042
Santurtzi (Vizcaya)	percentage	3.88
Sestao (Vizcaya)	Postal vote processed	876
Sestao (Vizcaya)	voters	28,065
Sestao (Vizcaya)	percentage	3.12