Year 2018 | Year 2017 | Year 2016 | Year 2015 | Year 2014 | Year 2013 | Year 2012 | |
---|---|---|---|---|---|---|---|

1 | 55.2 | 59.1 | 0 | 0 | 0 | 0 | 0 |

2 | 11.6 | 14.8 | 0 | 0 | 0 | 0 | 0 |

3 | 3.9 | 3.4 | 0 | 0 | 0 | 0 | 0 |

4 | 7.3 | 4.7 | 0 | 0 | 0 | 0 | 0 |

5 | 21.1 | 17.8 | 0 | 0 | 0 | 0 | 0 |

- Never (value when calculating levels: -2.0)
- In some lessons (value when calculating levels: -1.0)
- In about half of lessons (value when calculating levels: 0.0)
- In most of lessons (value when calculating levels: 1.0)
- In almost every lesson (value when calculating levels: 2.0)