There was literally no easy way to check this
It’s involved a bit of math, but the data’s out there and I updated the numbers just a few days ago:
https://steemit.com/steemleo/@preparedwombat/3vs4h1-the-steem-power-you-earn-for-holding-steem-power-revised
It was 2.248% a few days ago, actually up since last spring:
https://busy.org/@preparedwombat/the-steem-power-you-earn-for-holding-steem-power-revised
Your figures also come to almost the exact same outcome, awesome. Now users can at least see it easily in the wallet.