Table 1.

Population characteristic definitions and data sources.

Population Characteristic	Characteristic Definition	Data Source
Developed Settlement Type	Persons residing in urban (as defined in 2006 NCHS), rural, or remote rural (as defined in Goldsmith 2007) areas; total count population in each tract	2000 Decennial Census SF1 DP1
Sex	Female or male	2000 Decennial Census SF1 DP1
Age	0–19, 20–64, or ≥65 years	2000 Decennial Census SF1 DP1
Race/Ethnicity	Persons self-identified as single race among White, African-American/Black, American Indian and Alaska Native, Asian, Native Hawaiian and Other Pacific Islanders, and other race, or as two or more races—including as Hispanic	2000 Decennial Census SF1 DP1
Native Tribe Affiliation	Persons who self-identify as American Indian and Alaska Native alone with one tribe only or no tribe specified among Alaska Athabascan, Cherokee, Other American Indian, Eskimo, Aleut, Tlingit-Haida, and Other Alaska Native	2000 Decennial Census SF1a and NHGIS ID: DS146
Occupation Industry	Employed civilian population aged ≥16 years among 13 different industries ranging from agriculture, forestry, fishing and hunting, and mining to public administration	2000 Decennial Census SF3 DP3
Poverty	Persons below the 2000 census poverty thresholds	2000 Decennial Census SF3 QTP34
Unemployment	Persons ≥16 years old in civilian labor force who do not have an officially recorded employment	2000 Decennial Census SF3 DP3
Household Income	Household income levels in 1999	2000 Decennial Census SF3 DP3
Education Level	Persons ≥25 years old who had highest educational attainment of less than high school, high school, some college or associate’s, bachelor’s, or graduate school	2000 Decennial Census SF3 DP2