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KEY: p = preliminary; R = revised.
a Particulate matter less than 2.5 microns in size. Data include PM without condensable.
bIndustrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; solvent utilization; and storage and transportation.
KEY: P = preliminary; R = revised.
a Fine particulate matter less than 10 microns. Data include PM without condensable.
bIndustrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, other industrial processes; solvent utilization; and storage and transport.
c In 1985 there appears to be a spike in Miscellaneous emissions. This is likely due to a methodological change, and the EPA does not change historical data when it changes...
KEY: P = preliminary; R = revised.
aIndustrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; and solvent utilization, storage, and transport.
KEY: R = revised.
aIndustrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; and solvent utilization, storage, and transport.
KEY: P = preliminary; R = revised.
aIndustrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, other industrial processes; and solvent utilization, storage, and transport.
KEY: R = revised.
a Total performed includes scheduled departures performed minus those scheduled departures that did not occur plus unscheduled service.
b The number of persons receiving air transportation from an air carrier for which remuneration is received by the carrier, excluding persons receiving reduced rate charges, such as air carrier employees, infants, and others (except ministers of religion, elderly individuals, and handicapped individuals).
c The number of short tons transported on a...
a Includes the 50 States and the District of Columbia.
bUrban other arterial includes other freeways and expressways, other principal arterial, and minor arterial. Rural other arterial includes other principal arterial and minor arterial prior to 2009, and includes other freeways and expressways, other principal arterial and minor arterial for 2009.
cCollector is the sum of major and minor collectors.
KEY: N = data do not exist; U = data are not available.
a All operations other than those operating under 14 CFR 121 and 14 CFR 135. Data for 1996 are estimated using new information on nonrespondents and are not comparable to earlier years. Mileage in source is multiplied by 1.151 to convert to nautical-miles for 1985-1997.
b Data from 2007 were calculated using a new methodology developed by FHWA. Data for these years are based on new categories and are not comparable to previous years. The new category Light duty vehicle, short...
KEY: Btu = British thermal unit; DHS = Department of Homeland Security; FY = fiscal year; GSA = General Services Administration; N = data do not exist; NASA = National Aeronautics and Space Administration; R = revised.
a Includes all U.S. government agencies not separately displayed. See http://ctsedwweb.ee.doe.gov/Annual/Report/AgencyReference.aspx for agency list.
b Includes liquefied petroleum gas and Navy special fuel oil.
KEY: Btu = British thermal unit; kWh = kilowatt hour; R = revised.
a Revenue passenger-miles data prior to 2001 are fiscal year data; 2001 data and more recent data are calendar year data.
b Includes electric power generation and distribution losses.
cElectric usage and diesel usage data are calendar year data.