Annual Statistical Supplement, 2021

Abbreviations

AFDC
Aid to Families with Dependent Children
AIME
Average indexed monthly earnings
AMW
Average monthly wage
CDR
Continuing disability review
COLA
Cost-of-living adjustment
CPI-U
Consumer Price Index for All Urban Consumers
CPI-W
Consumer Price Index for Urban Wage Earners and Clerical Workers
CPS
Current Population Survey
DI
Disability Insurance
FICA
Federal Insurance Contributions Act
FRA
Full retirement age
HI
Hospital Insurance
IRS
Internal Revenue Service
MBC
Monthly benefit credited
MBR
Master Beneficiary Record
NRC
National Research Council
OASDI
Old-Age, Survivors, and Disability Insurance
OASI
Old-Age and Survivors Insurance
OBRA
Omnibus Budget Reconciliation Act
PIA
Primary insurance amount
QC
Quarter of coverage
SECA
Self-Employment Contributions Act
SGA
Substantial gainful activity
SMI
Supplementary Medical Insurance
SPM
Supplemental Poverty Measure
SSA
Social Security Administration
SSI
Supplemental Security Income
WEP
Windfall Elimination Provision