I've made a rough calculation, it seems the last burst will be mined March 2021.
Here is a calculation on google docs:

https://docs.google.com/spreadsheets/d/1qxOqRp9IKmhX0lSiVRf3ydYqJACpqBSx-4Mf3yWgJ5o/edit?usp=sharing

UPDATE:
I'd found out how to calculate the BURST mining term correctly, so I've changed the table.
The final term for mining stoppage is July 2029.