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
|