Answer distribution
Year 2019Year 2018Year 2017Year 2016Year 2015Year 2014Year 2013Year 2012
11.28.72.12.64.23.247.2100.0
214.818.820.841.012.558.147.20.0
382.771.077.156.483.338.75.60.0

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