Skip to Content Release dates | Documentation Current Monthly Release Other formats: ASCII | PDF (144 KB) Supplemental Monthly Release Other formats: ASCII | PDF (144 KB) Annual Revision Release Other formats: ASCII | PDF (150 KB) Data Download Program (DDP) | Announcements | Historical data (text files) Documentation for the Revision History of Total Industrial Production
I. Introduction:
II. Data format and file information:
Data format:
The series codes are comprised of two fields, a prefix and an industry code,
separated by a period. For this revision history, the only
industry included is total manufacturing, mining, and utilities,
denoted by the industry code B50001. Only estimates for the
seasonally adjusted data are included.
The prefixes used in the variable names (i.e., init., rev1., rev2., rev3., rev4., rev5., and rev6.) denote the timing of the publication of the data. init. Initial index level, published about 15 days after the end of the month. rev1. first revision, published about 45 days after the end of the month. rev2. second revision, published about 75 days after the end of the month. rev3. third revision, published about 105 days after the end of the month. rev4. fourth revision, published about 135 days after the end of the month. (Usually identical to third revision, except when there was an annual or major revision.) rev5. fifth revision, published about 165 days after the end of the month. rev6. sixth revision, published about 195 days after the end of the month. For example, the initial February 2008 value was published in the middle of March 2008. At the same time, the first revision of the January 2008 value was being published. III. Calculation of growth rates:
Computing growth rates similar to those actually published requires some care. For example, one should divide the initial estimate of February 2008 (published in mid-March 2008) by the first revision of January 2008 IP (also published in mid-March 2008) to get the initial estimate of growth in February 2008. Use the following formulas to calculate the published growth rates for a series: Initial growth rate: 100 * ((init[t] / rev1[t-1]) - 1) First revision of growth rate: 100 * ((rev1[t] / rev2[t-1]) - 1) Second revision of growth rate: 100 * ((rev2[t] / rev3[t-1]) - 1) Third revision of growth rate: 100 * ((rev3[t] / rev4[t-1]) - 1) Fourth revision of growth rate: 100 * ((rev3[t] / rev5[t-1]) - 1) Fifth revision of growth rate: 100 * ((rev3[t] / rev6[t-1]) - 1) Estimates of the index levels prior to 1992 are only available to 1
decimal place so percent changes calculated from them may sometimes
round differently than the growth rates actually published, which are
based on unrounded data. The four decimal accuracy provided in the
file after 1992 will usually yield a growth rate that rounds to the
one published.
Release dates | Documentation Current Monthly Release Other formats: ASCII | PDF (144 KB) Supplemental Monthly Release Other formats: ASCII | PDF (144 KB) Annual Revision Release Other formats: ASCII | PDF (150 KB) Data Download Program (DDP) | Announcements | Historical data (text files) Statistical releases |