regime (mbp)
0 = a
1 = sd
2 = d

free and fair elections
0 = mv
1 = pv
2 = nv

inclusive franchise
0 = mv
1 = pv
2 = nv
9 = --

transitions
0 = no transition
1 = to sd
2 = to d

breakdowns
0 = no break
1 = breakdown

cheibub-gandhi classification of regimes
0 = parliamentary democracy
1 = mixed democracy
2 = presidential democracy
3 = civilian dictatorship
4 = military dictatorship
5 = monarchy

10 = breakdown
21 = stable a
22 = stable a
30 = transition to sd
40 = transition to d
51 = stable d or sd
52 = stable d or sd