Change in XMR in circulation p.a.
Monero's tail emission is fixed amount per block, while coins lost annually is some percentage. In some point the amount of Monero in circulation will stabilize to where tail emission equals to lost coins. With this calculator you can try out what the future of Monero in circulation will look like with different lost coins percentages.
Note that if lost coins annually is higher than tail emission in the beginning, the amount of XMR in circulation will actually decrease until inflation stabilizes to 0%.