Child poverty rate in the United States 1990-2018

"The data in the latest report are from the 2016 Current Population Survey (CPS) Annual Social and Economic Supplement (ASEC) and were collected in the 50 states and the District of Columbia. The data do not represent residents of Puerto Rico and U.S. Island Areas. The data are based on a sample of about 95,000 addresses. The estimates in this report are controlled to independent national population estimates by age, sex, race, and Hispanic origin for March 2016. Beginning with 2010, estimates are based on 2010 Census population counts and are updated annually taking into account births, deaths, emigration, and immigration."
A person is poor, if his annual income is less than $11,945. This threshold is calculated for 2012 and depends on age and the number of household members.

For 2004, figures are revised to reflect a correction to the weights in the 2005 ASEC.
For 2000: Consistent with 2001 data through implementation of Census 2000-based population controls and a 28,000 household sample expansion.
For 1999, figures are based on Census 2000 population controls.
For 1992, figures are based on 1990 census population controls.
For 1991, figures are revised to correct for nine omitted weights from the original March 1992 CPS file.

For information on sampling error, nonsampling error, and definitions, see Current Population Survey, 2013 Annual Social and Economic (ASEC) Supplement