Fetch information on accidents according severity for each year 2015-2017

The results should contain the following information for the years 2015-2017 with markers."locationAccuracy" = 1:

1. junction name
2. long
3. lat
4. Geometry of the junction
5. total accidents for that junction
6. count of accidents with low severity
7. count of accidents with medium severity
8. count of accidents with high severity