Year	HCB (no index)	HCB	HCB index	HCH (no index)	HCH	HCH index	PCB (no index)	PCB	PCB index	Dioxins and furans (no index)	D&F index	Dioxins and furans	PAH (no index)	PAH	PAH index
1990	5.2	100		185.1	100		13.79	100		0.01167		100	2671.1	100
1991	4.9	95.1		170.1	91.9		13.23	96		0.01113		95.4	2906.3	108.8
1992	5.1	98.1		132	71.3		12.73	92.3		0.01049		89.9	3082.7	115.4
1993	5	96		111.7	60.3		12.33	89.4		0.00974		83.4	3039.6	113.8
1994	4.6	88.8		103.5	55.9		11.87	86.1		0.00897		76.8	2758.6	103.3
1995	4.8	91.4		91.6	49.5		11.4	82.7		0.00836		71.6	2985.8	111.8
1996	4.8	91.8		91.4	49.4		10.73	77.9		0.00726		62.2	2609.7	97.7
1997	4.8	92.2		76	41.1		10.37	75.2		0.00635		54.4	2276.4	85.2
1998	5	97.1		59.9	32.4		10	72.5		0.00567		48.6	2160.6	80.9
1999	0.6	12		56.2	30.3		9.43	68.4		0.00476		40.8	2008.8	75.2
2000	0.6	11.4		49.6	26.8		5.04	36.6		0.00427		36.6	1541.2	57.7
2001	0.5	10.2		43.2	23.3		4.73	34.3		0.00366		31.3	1730.8	64.8
2002	0.5	9		28.4	15.4		4.08	29.6		0.00285		24.5	1197.6	44.8
2003	0.5	9.2		21.7	11.7		3.79	27.5		0.00247		21.2	1246.7	46.7
2004	0.4	8		19.1	10.3		3.98	28.9		0.00238		20.4	1182.4	44.3
2005	0.4	8.4		16.9	9.1		4.28	31		0.00216		18.5	1081.6	40.5
2006	0.3	6.4		15.1	8.2		4.26	30.9		0.00199		17.1	1094.9	41
2007	0.3	6.5		13.6	7.3		3.92	28.4		0.00195		16.7	1084.3	40.6
2008	0.3	6		12.2	6.6		4.15	30.1		0.00193		16.6	1128.9	42.3
2009	0.2	4.8		11	6		3.59	26		0.00172		14.7	1081.2	40.5
2010	0.2	4.3		10	5.4		3.97	28.8		0.00182		15.6	1203.2	45
2011	0.2	4.4		9.1	4.9		3.68	26.7		0.00181		15.5	1131.8	42.4