Table

Noise annoyance by source. Counties. 1999 and 2014. Annoyance index SPI¹
	Road traffic²		Railroad traffic		Air traffic
	1999³	2014	1999	2014	1999	2014
¹Calculated according to the national environmental target for noice annoyance.
²Calculated from 55 dB(A) upwards.
³Simplified calculation for road traffic noise in 1999.
The whole country	388 800	374 000	33 800	17 900	28 900	25 500

Østfold	23 000	23 000	1 800	600	5 100	2 700
Akershus	52 300	48 800	6 800	4 200	2 600	2 200
Oslo³	85 000	84 700	11 600	7 000	..	..
Hedmark	9 800	9 100	1 700	900	0	0
Oppland	11 200	10 300	1 200	600	0	0
Buskerud	16 100	15 100	2 900	1 500	..	..
Vestfold	16 700	16 000	1 300	200	900	900
Telemark	11 600	11 200	800	200	..	..
Aust-Agder	7 500	7 000	100	50	..	..
Vest-Agder	14 000	13 800	700	400	600	600
Rogaland	42 300	41 100	1 900	400	6 200	5 200
Hordaland	48 800	46 900	300	200	2 800	3 000
Sogn og Fjordane	5 000	4 700	0	20	0	15
Møre og Romsdal	14 300	13 500	0	800	300	400
Sør-Trøndelag	13 400	12 600	1 600	400	1 100	1 000
Nord-Trøndelag	5 200	4 700	600	400	1 400	1 500
Nordland	6 000	5 400	500	0	5 100	5 400
Troms	4 000	3 600	0	0	1 500	1 600
Finnmark	2 400	2 400	0	0	1 300	1 100