1. How many people have been treated for serious knife injuries (those which require stitches or worse)?
2. How many people have been treated for life threatening knife injuries?
3. How many people have been treated for multiple knife injuries in the same attack?
4. How many people have been treated for gun/ bullet injuries?
Please provide figures for each year of 2016, 2017 and 2018. Please also provide the age of the youngest and the oldest person treated for the injuries in each question.