Master/texmf-dist/doc/metapost/base/source/lead.d


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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