Answer distribution
Year 2018Year 2017Year 2016Year 2015Year 2014Year 2013Year 2012
15.85.49.87.111.827.525.6
29.67.311.07.922.933.353.8
384.286.778.785.064.739.220.5

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