Or do you need to count a person more than once if they selected 5,7,12 or 16 for multiple variables? In that case, you’d want to do something like this:

pctin(B4_1,5,7,12,16) +
pctin(B4_2,5,7,12,16) +
pctin(B4_3,5,7,12,16) +
pctin(B4_4,5,7,12,16)