I've been staking nearly a month since the airdrop. I dont keep the wallet open 24hrs, so calculations may be slightly off, but so far staking rewards are 300 TOKC from 5500 TOKC.
so perhaps 100% per yr is more accurate than 200%?
look at the table higher. it looks like % of POS is going down. and it does not depends on price at exchange. more time between payouts, less coins...