Source
General Social Survey https://gss.norc.org
Values
NA(d) don't know / NA(i) iap / NA(j) I don't have a job / NA(m) dk, na, iap / NA(n) no answer / NA(p) not imputable / NA(r) refused / NA(s) skipped on web / NA(u) uncodeable / NA(x) not available in this release / NA(y) not available in this year / NA(z) see codebook
Question Years and Ballots
| year | ballots | availability |
| 2002 | A/B/C/- | full |
| 2004 | A/B/C/- | full |
| 2006 | A/B/C/D | full |
| 2008 | A/B/C/- | full |
| 2010 | A/B/C/- | full |
| 2012 | A/B/C/- | full |
| 2014 | A/B/C/- | full |
| 2016 | A/B/C/- | full |
| 2018 | A/B/C/- | full |