A similar survey in 2004 found that these percentages changed to 82% and at most 2%, respectively, and that confidence in MMR had been increasing over the previous two years.
Survei serupa tahun 2004 menemukan bahwa masing-masing persentasenya berubah menjadi 82% dan 2% dan kepercayaan terhadap MMR meningkat selama dua tahun terakhir.