| state | N/A | https://api.census.gov/data/2012/ecnvalcon?get=GEO_TTL,ST,NAICS2012_TTL,CONSTA,GEO_ID,RCPCWRK_S,RCPCWRK&for=state:*&NAICS2012=23&key=YOUR_KEY_GOES_HERE | |
| https://api.census.gov/data/2012/ecnvalcon?get=GEO_TTL,ST,NAICS2012_TTL,CONSTA,GEO_ID,RCPCWRK_S,RCPCWRK&for=state:02&NAICS2012=23&key=YOUR_KEY_GOES_HERE | |
| us | N/A | https://api.census.gov/data/2012/ecnvalcon?get=GEO_TTL,ST,NAICS2012_TTL,CONSTA,GEO_ID,RCPCWRK_S,RCPCWRK&for=us:*&NAICS2012=23&key=YOUR_KEY_GOES_HERE | |
| https://api.census.gov/data/2012/ecnvalcon?get=GEO_TTL,ST,NAICS2012_TTL,CONSTA,GEO_ID,RCPCWRK_S,RCPCWRK&for=us:00&NAICS2012=23&key=YOUR_KEY_GOES_HERE | |