Enumerations for _SG_project.Initial_of_center (An open enumeration)
`BIGS` | enumeration_text
`BSGC` | enumeration_text
`BSGI` | enumeration_text
`CESG` | enumeration_text
`ISPC` | enumeration_text
`JCSG` | enumeration_text
`MCSG` | enumeration_text
`MSGP` | enumeration_text
`NESG` | enumeration_text
`NYSGRC` | enumeration_text
`OPPF` | enumeration_text
`PSF` | enumeration_text
`RSGI` | enumeration_text
`S2F` | enumeration_text
`SECSG` | enumeration_text
`SGC` | enumeration_text
`SGPP` | enumeration_text
`SPINE` | enumeration_text
`TBSGC` | enumeration_text
`XMTB` | enumeration_text
`YSG` | enumeration_text