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