A western study doesn't make the participants any less pressured by their authoritative goverment to not give negative feedback. Regardless of who asks the questions, these people still live their lives under the goverment.
It would be one thing to have a majority of their citizen be satisfied with how a goverment is run, but 95.5% approval rating is just illogical. It could only happen if there is pressure to give a positive answer or they are living in a utopia, and we all know human nature rules out the possibility of the second from ever existing.