Year	Cadmium	Lead	Mercury
1990	100	100	100
1991	93.73	77.97	95.14
1992	88.88	63.76	88.77
1993	80.99	56.89	76.82
1994	78.7	51.46	73.74
1995	81.65	47.62	72.31
1996	77.21	41.53	67.03
1997	75.86	37.37	62.24
1998	69.58	33.92	58.96
1999	65.89	29.03	55.9
2000	64.28	21.11	54.67
2001	60.77	17.1	51.17
2002	57.53	13.73	49.58
2003	54.96	13.27	47.83
2004	53.72	12.78	47.22
2005	51.16	12.23	45.46
2006	49.15	12.02	44.86
2007	45.15	11.35	43.39
2008	43.83	11.29	41.65
2009	36.15	7.52	29.78
2010	37.37	8.24	30.33
2011	35.24	7.97	29.37
2012	34.01	7.96	28.2
2013	33.3	7.68	27.46
2014	33.75	8.29	26.62