SA6 Footnotes

1/ The estimates for 1958-74 are based on the 1967 Standard Industrial Classification (SIC). The estimates for 1975-87 are based on the 1972 SIC. The estimates for 1988-2001 are based on the 1987 SIC.
2/ Includes actual employer contributions and actuarially imputed employer contributions to reflect benefits accrued by defined benefit pension plan participants through service to employers in the current period.
3/ Average compensation per job is compensation of employees divided by total full-time and part-time wage and salary employment.
4/ Under the 1972 SIC, ordnance was reclassified to four 2-digit industries: Fabricated metal products, electronic and other electric equipment, transportation equipment, and instruments and related products.
5/ Under the 1987 SIC, combined real estate, insurance, etc., was reclassified to four 2-digit industries: Nondepository credit institutions; insurance agents, brokers, and services; real estate; and legal services.
6/ Social services was first recognized under the 1972 SIC, so estimates for 1969-74 do not exist.
7/ Engineering and management services was first recognized under the 1987 SIC, so estimates for 1969-87 do not exist.
Note-- All dollar estimates are in current dollars (not adjusted for inflation).
(D) Not shown to avoid disclosure of confidential information, but the estimates for this item are included in the total.
(L) Less than $50,000, but the estimates for this item are included in the total.
(NA) Data not available for this year.
(NM) Not meaningful.
Last updated: May 30, 2014-- revised estimates for 1958-2001.