Collecting and Using Industry and Occupation Data

The National Center for Health Statistics (NCHS) and NIOSH created non-Census industry and occupation codes for people who were not in the civilian workforce, such as housewives, volunteers, students, and those without sufficient information. These were created because Census, NAICS, and SOC only include paid industries and occupations.
Non-Paid worker titles	Industry 1990	Occupation 1990	Industry 2000	Occupation 2000	Industry 2002, 2010, 2012, 2018	Occupation 2002, 2010, 2012, 2018
Housewife	961	914	989	901	9890	9010
Homemaker	961	914	989	901	9890	9010
Volunteer	961	916	989	902	9890	9020
Student	961	915	989	905	9890	9070
Retired	970	913	988	906	9880	9060
Did not work	961	917	989	910	9890	9100
Child or Infant	961	917	989	910	9890	9100
Patient	961	917	989	910	9890	9100
Disabled	961	917	989	910	9890	9100
Inmate	961	917	989	910	9890	9100
Blank, unknown, don’t know, n.a., refused or information is inadequate	990	999	999	990	9990	9900