Table 1.

Summary of the concentration (mg kg⁻¹) averages (±1SD) of Hg, Pb and Cd in canned tuna per every year of the studied period. Data source: INP.

Year	Samples	Hg	Cd	Pb
2009	34	0.30 ± 0.016
2010	759	0.20 ± 0.15	0.034 ± 0.031	0.064 ± 0.117
2011	562	0.27 ± 0.18	0.040 ± 0.030	0.046 ± 0.300
2012	377	0.26 ± 0.18	0.021 ± 0.011	0.038 ± 0.005
2013	377	0.25 ± 0.17	0.032 ± 0.037	0.060 ± 0.040
2014	294	0.20 ± 0.11	0.044 ± 0.039	0.093 ± 0.072
2015	89	0.21 ± 0.11	0.026 ± 0.011
2016	80	0.14 ± 0.08
2009–2016	2572	0.23 ± 0.14	0.032 ± 0.027	0.058 ± 0.050
Limits		1.00	0.1	0.3

The bold values can be represents the plain text.