How is STEEM chill out or where the money drives from?

A lot of discussion on Steemit is dedicated to questions: what is really STEEM mining rate and what is the inflation programmed per year. I tried to understand how it works and made some investigation.

The STEEM White paper says:

Then the network starts rewarding users who convert to SP. At this point, STEEM grows at a rate of approximately 800 STEEM per minute due to the combined effects of the various Contribution Rewards ...

When the various individual components of the 800 STEEM per minute rate reach their respective percentage-based floors, each floor halts the fall in its component of the rate. This in turn means that, over the long term, the nominal rate will rise from 800 STEEM per minute to the (time-varying, supply-dependent) value needed to maintain a constant annualized growth rate of 10% for the Contribution Incentives, and a constant annualized growth rate of 100% for the combined effect of the Contribution Incentives and the Power Incentives.

I copied blockchain data from steemd.com during this month and calculate actual mining rates:

>>>    head_block_number                time  virtual_supply  blocks_delta  \
1            3741103 2016-08-02 21:02:45    1.200000e+08            48   
2            4169242 2016-08-17 19:44:12    1.336217e+08        428139   
3            4309722 2016-08-22 17:49:42    1.379500e+08        140480   

         time_delta   steem_delta  sec_delta  sec_per_block  steem_per_block  \
1   0 days 00:02:24      1489.840        144       3.000000        31.038333   
2  14 days 22:41:27  13621729.487    1291287       3.016046        31.816138   
3   4 days 22:05:30   4328305.580     425130       3.026267        30.810831   

   steem_per_sec  steem_per_min  
1      10.346111     620.766667  
2      10.548956     632.937348  
3      10.181134     610.868052

So, you could see that the block generated every 3 seconds and contains 30 STEEM, in other words it was generated about 600 STEEM per minute. It is still less than declared 800 per minute rate.

Python source code

If this rate will remain the same, the annual emission displays 600STEEM * 60min * 24h * 365d = 315,360,000 STEEM. During the next year the supply will increase on 315M STEEM / 138M STEEM = 2.28 times or on 228%.

It is still not clear for me: how STEEM rate is adjusted and where is promised 100% annual growth?

Confirmation for my calculation is very appreciated in comments. I will be thankful for any clarification of the matter.