The other figures are PG/VG
PG gives the mixture the 'Throat Hit' and brings the flavour out in the liquid.
VG gives the vapour production, and smoothness to the liquid, but its very thick and looks like a clear wallpaper paste.
Some people can be 'sensitive' to PG. Personally I use a 50/50 PG/VG mix, but thats a personal choice, and again this is a subjective topic!!