Levels for new 'slots'

[TheFluffySlipper]

It would be great to know at what level we receive new slots! All I can remember are the two that come after each other on 23 and 24 ... I think lol.

In order to make a current list, please copy the numbers from the last post, add the level/s you remember and paste in a new post for others to see. Hopefully we can unravel the mystery together

Level 1 (start with 4 slots)
Level 3 - 5 slots
Level 5 - 6 slots
Level 7 - 7 slots


Level 14 - 10 slots

Anybody able to fill in these missing levels?

Level 21 - 13 slots
Level 23 - 14 slots
Level 24 - 15 slots
Level 28 - 16 slots
Level 30 - 17 slots
Level 32 - 18 slots
Level 34 - 19 slots
Level 37 - 20 slots