U.S. Bureau of the Census

Current Industrial Keports Industrial Gases, U.S. Bureau of the Census, Washiagton, D.C., 1961—1993. 

Economic Aspects and Uses. Production and pricing information for Na2S through 1991 are Hsted in Table 2. U.S. production of sodium sulfide increased rapidly from 1965 through 1972 and then began to decrease. The last year that the U.S. Bureau of the Census released official production figures was in 1974 because at that time there were only three producers of sodium sulfide. Estimates indicate that 1991 production fell to the levels of the late 1950s. List prices have increased since 1974 as sulfur and sodium hydroxide prices have increased. 

Chronological Age. Because of this wide variation within the elderly population, it is difficult to devise a catch-all age one must attain to be considered elderly. Within the government, there also appears to be a problem of consistently defining this age group. Table 2, which lists a variety of federally funded programs and their corresponding age criteria, illustrates this point quite well. Table 3 lists what seems to be one of the better classification systems that has been devised [5], As well as being the system currently used by the U.S. Bureau of the Census, it is often implemented in studies that specifically deal with elderly populations [6,7]. 

U.S. Bureau of the Census, Demographic and socioeconomic aspects of aging in the United States, Current Population Reports. Series P-23, No. 138, U.S. Government Printing Office, Washington, DC, 1984. 

U.S. Bureau of the Census, Historical Statistics of the United States, Colonial Times to 1970, Bicentennial Edition (Washington, D.C. Government Printing Office, 1975), pp. 105-109, 117-118. 

Figure 1. Age-adjusted cancer death rates for selected sites, males, United States, 1930 to 1978. Standardized on the age distribution of the 1970 U.S. census population. Sources of data National Vital Statistics Division and U.S. Bureau of the Census. (Reproduced with permission from Ref. 70. Copyright 1982, American...

Energy consumption data adapted from U.S. Department of Energy (1994). Population data are for mid-1994 (U.S. Bureau of the Census. 1994). Sums of individual figures may not equal totals because of rounding. 

Tan CH, Tay LK Tardive dyskinesia in elderly psychiatric patients in Singapore. Aust N Z J Psychiatry 25 119-122,1991 U.S. Bureau of the Census 1990 Summary Tape File 1C. Washington, DC, U.S. Bureau of the Census, 1990 Weber WW The Acetylator Genes and Drug Responses. New York, Oxford University Press, 1987... 

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