That is not a set figure, what is set is the amount of tokens added to the rewards pool, and Scotbot is also set to reduce that amount with 5% per year from the previous year, so it started with 5.552 ALIVE tokens added to the rewards pool each 100 blocks (5 minutes), then it has been reduced by 5% from the previous year 2 times, so (5.552 * 0.95) * 0.95 = 5.0106(8), that will give you the amount for the rewards pool for Posting Rewards (miners use a smart contract and are also reduced by 5% per year), and the split is 50/50 to authors/curators and using a linear rewards curve, payout is after 7 days.

What then affects curation APR is how targeted your own voting is in relation to everyone else who is voting, the rewards pool is like a water balloon and the upvotes like pinching it, so it's all dynamic and if others are using their ALIVE votes less then your targeted votes have more value as you use them more, and vice versa.

So the only way to know your curation APR is to measure it, divide your yearly curation earnings with your stake and you will get the APR for your own account.

!ALIVE