Report copyright - 15 Years of Results - US EPA · 2015. 8. 4. · 6.2 12.7 12.6 11.6 8.1 7.5 10.0 9.1 5.9 9.2 16.7 8.2 15.2 13.5 18.7 25.0 22.5 21.4 16.5 15.3 19.9 22.4 16.9 13.9 15.1 4.0 2009 Source:
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