Aren't the electors middle ranked party members? This is like saying all of the electoral college reps for president voted correctly. But of course the party acts as one due to deliberation and democratic centralism, the point is to be cohesive and put your best foot forward and not infight openly to the public and make their opinion of you worse for no gain. All of the talks are usually internal to the party, vote percentage is nonsensical. What people vote for in this society are the lower level reps whom they can talk with personally, sometimes these lower reps are at ratios of 100:1 in best instances, so it's very easy to voice anger and get help with issues and demand they change their votes for the higher offices. It also becomes easier to unseat them and take the spot yourself.

In other news, 0.07% of North koreans disappear.

So big question who voted against him

Directly from KCNA here: http://www.kcna.kp/en/article/q/64e900f5bd0353837ca02d7babcce3adf0e6857b3bc915d1758c332d4b2dcdc2e90b7d9d2886bc48b3cc61aad7ed43cc.kcmsf

According to the election returns, 99.99 percent of all the voters registered on the voter rolls across the country attended the election. 0.0037 percent of the voters failed to take part in the election as they are currently abroad or working in oceans and 0.00003 percent abstained.

99.93 percent of the electors balloted for and 0.07 percent against. As a result, under the Law of the DPRK on the Elections of Deputies to the People's Assemblies at All Levels, 687 workers, farmers, intellectuals, servicepersons and officials were elected to be SPA deputies.