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lead.d
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1996-08-24
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280b
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25 lines
80 70.6
81 56.4
82 54.4
83 46.4
84 40.1
85 20.1
86 8.4
87 8.0
88 7.6
89 7.2
90 7.1
82 .484
83 .413
84 .381
85 .258
86 .151
87 .108
88 .087
89 .074
90 .070
First: National lead emissions in thousands of metric tons
Second: Average lead level in micrograms per cubic meter of air