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Data for Figure 3-2
Total 1996 2007 2020
DPM 527.8 367.8 325.8
Benzene 257.4 142.8 108.7
1,3-Butadiene 122.7 87.4 79
Formaldehyde 102.9 51.8 41.8
Acetaldehyde 71.8 43.3 33

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United States Department of Transportation - Federal Highway Administration