Answer distribution
Year 2019Year 2018Year 2017Year 2016Year 2015Year 2014Year 2013Year 2012
11.85.04.74.12.513.120.529.1
211.013.710.415.017.823.139.143.6
386.780.984.881.079.763.140.427.3

Choices for answers

  1. No (value when calculating levels: -2.0)
  2. I don't know (value when calculating levels: -2.0)
  3. Yes (value when calculating levels: 2.0)

The question affects following sections