GUIDE TO TABULAR PRESENTATION The following symbols, used in the tables throughout this book, are explained in condensed form in footnotes to the tables where they appear: Represents zero or rounds to less than half the unit of measurement shown. B Base figure too small to meet statistical standards for reliability of derived figure. D Figure withheld to avoid disclosure of information pertaining to a specific organization or individual. NA Data not enumerated, tabulated, or otherwise available separately. NS Percent change irrelevant or insignificant. S Figure does not meet publication standards for reasons other than that covered by symbol B, above. X Figure not applicable because column heading and stub line make an entry impossible, absurd, or meaningless. Z Entry would amount to less than half the unit of measure shown. Headnotes immediately below table titles provide information important for correct interpretation or evaluation of the table as a whole or for a major segment of it. Footnotes below the bottom rule of tables give information relating to specific items or figures within the table. Unit indicators ("In thousands," "In millions of dollars," etc.) are usually given in boldface type as the first element of the headnote. In tables where several units are used, the unit indicators are generally given in the stub or in the column headings. Median: The value which divides the distribution into two equal parts-one-half the cases falling below this value and one-half exceeding it. Parallel vertical rules are used to the right of a total column to indicate (1) that the components which follow add to the total (e.g., tables 1, 3, 17, etc.); (2) in the case of derived figures, that the underlying data are additive to their total (e.g., table 17 for percentages, table 25 for ratios, table 68 for rates and table 104 for averages). Heavy vertical rules are used (1) in tables where the stub (the area, date, or descriptive column at the left) is continued into one or more additional columns across the table to separate each segment of stub and its accompanying data columns from the continued segments (e.g., tables 2, 5, 10, etc.); (2) to set off independent sections of a table (e.g., tables 1, 4, 7, etc.). In many tables, details will not add to the totals shown because of rounding. CONTENTS [Numbers following subjects are page numbers] Fig. 1. Map of the United States, showing Census divisions and regions..... Page xii Sec. 2. VITAL STATISTICS, HEALTH, AND NUTRITION...... Fig. IV. Vital statistics rates.. Fig. V. Office-based private physicians, by type of practice.. Vital statistics summary. Births, rates, fertility. Sec. 3. IMMIGRATION AND NATURALIZATION..... Figs. VI-VII. Immigrant and nonimmigrants; Aliens naturalized. Sec. 5. LAW ENFORCEMENT, FEDERAL COURTS, AND PRISONS Homicides and suicides. Figs. XI-XII. Homicides and suicides; Persons charged with crimes.. GUIDE TO TABULAR PRESENTATION The following symbols, used in the tables throughout this book, are explained in Represents zero or rounds to less than half the unit of measurement shown. B Base figure too small to meet statistical standards for reliability of derived D Figure withheld to avoid disclosure of information pertaining to a specific NA Data not enumerated, tabulated, or otherwise available separately. NS Percent change irrelevant or insignificant. S X Figure does not meet publication standards for reasons other than that Figure not applicable because column heading and stub line make an entry Z Entry would amount to less than half the unit of measure shown. Footnotes below the bottom rule of tables give information relating to specific items or Unit indicators ("In thousands," "In millions of dollars," etc.) are usually given in Median: The value which divides the distribution into two equal parts-one-half the Parallel vertical rules are used to the right of a total column to indicate- (1) that the components which follow add to the total (e.g., tables 1, 3, 17, etc.); (2) in the case of derived figures, that the underlying data are additive to their Heavy vertical rules are used- (1) in tables where the stub (the area, date, or descriptive column at the left) (2) to set off independent sections of a table (e.g., tables 1, 4, 7, etc.). In many tables, details will not add to the totals shown because of rounding. CONTENTS [Numbers following subjects are page numbers] Vital statistics summary.. Births, rates, fertility. Sec. 3. IMMIGRATION AND NATURALIZATION... Figs. VI-VII. Immigrant and nonimmigrants; Aliens naturalized. Sec. 5. LAW ENFORCEMENT, FEDERAL COURTS, AND PRISONS... Figs. XI-XII. Homicides and suicides; Persons charged with crimes.. Page Sec. 7. PUBLIC LANDS, PARKS, RECREATION, AND TRAVEL.. Figs. XIV-XV. Federally owned land; Park systems.. Sec. 11. INCOME, EXPENDITURES, AND WEALTH.. Fig. XX. GNP and personal consumption expenditures. Fig. XXI. Persons below low income level... National product and income... Fig. XXII-XXIII. Wholesale price indexes; Consumer price indexes. Purchasing power of the dollar..... 346 | Export and import prices. |
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