Table 1.

Variables used in this article

DataVariablePeriodNDefinitionSource
Public lands visitationBLMV1982–200519(Total recreational visits to all U.S. BLM properties)/(total U.S. population)U.S. Bureau of Land Management and www.census.gov
JapanNPV1950–200556(Total recreational visits to all Japanese national parks)/(total Japanese population)Japanese government and www.stat.go.jp/data/chouki/zuhyou/02-01.xls
NFV1939–200261(Total recreational visits to all U.S. national forests)/(total U.S. population)U.S. National Forest Service and www.census.gov
NPV1939–200567(Total recreational visits to all U.S. NPS properties)/(total U.S. population) www2.nature.nps.gov/stats and www.census.gov
SpainNPV1996–200611(Total recreational visits to all Spanish national parks)/(total Spanish population)Spanish government and www.populstat.info/Europe/spainc.htm
SPV1950–200324(Total recreational visits to all U.S. state parks)/(total U.S. population)Statistical Abstracts of the USA www.census.gov/statab/www and www.census.gov
Game licensesDucks1935–200672(Total no. of duck stamps issued)/(total U.S. population)Ducks Unlimited and www.census.gov
Fishing1950–200553(Total no. of fishing licenses issued)/(total U.S. population)Statistical Abstracts of the USA www.census.gov/statab/www and www.census.gov
Hunting1950–200552(Total no. of hunting licenses issued)/(total U.S. population)Statistical Abstracts of the USA www.census.gov/statab/www and www.census.gov
CampingCamping1970–200315(No. of people surveyed that went camping anywhere over the past year)/(total no. of people surveyed)Statistical Abstracts of the USA www.census.gov/statab/www and www.census.gov
mmCampingNP/NF1988–200518(No. of people surveyed that went camping in national parks or forests over the past year)/(total no. of people surveyed)Mediamark, Inc.
mmCampingSP/SF1988–200518(No. of people surveyed that went camping in state parks or forests over the past year)/(total no. of people surveyed)Mediamark, Inc.
Backpacking/hikingATHiking1935–200571(No. of hikers completing all 3,500 km of the Appalachian Trail)/(total U.S. population) www.appalachiantrail.org/hike/thru_hike/facts.html and http://www.census.gov
Hiking1970–200316(No. of people surveyed that went hiking anywhere over the past year)/(total no. of people surveyed)Statistical Abstracts of the USA www.census.gov/statab/www and www.census.gov
Backpacking1972–200315(No. of people surveyed that went backpacking anywhere over the past year)/(total no. of people surveyed)Statistical Abstracts of the USA www.census.gov/statab/www and www.census.gov
mmBackpackingHiking1988–200518(No. of people surveyed that went backpacking or hiking anywhere over the past year)/(total no. of people surveyed)Mediamark, Inc.