phone hacking survey evaluation

The responses I got back from my phone hacking survey where not surprising to me because almost everyone that partook in the filling out and completing the survey answered the questions similarly.  Altogether there were 8 questions on my survey and they mostly consisted of yes or no questions and a staggering 80% of the surveys I have critically evaluated were answered the same as each other but my last question which asked was this questionnaire was this questionnaire useful 50% said yes the other half said no which was a huge disappointment. 100% of the people who carried out my survey all knew what phone hacking was and 83.3% agreed that phone hacking is an offence and should be made illegal.