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The details can be found here: https://steemit.com/steem/@steemitblog/final-review-of-steem-economic-changes

The relevant points are:

Inflate at 9.5% APR narrowing to 0.95% APR by 0.01% every 250,000 blocks (Roughly 0.5% per year).

and

15% of inflation is allocated to Steem Power