The following stats are based on the most current information as of March 9, 2015:

Total coins in existence currently 20.79 billion

Total coins minted in the last year (365 days) 2.18 billion

Current minting block reward rate is 15% annually

210,881,430 coins have been minted in the last 31 days

This is an average of 6,802,627 new coins per day being minted currently

This means that the minting participation rate is currently at 80.43%

This would result in an annual increase in the money supply of 12.06% currently

But based on last year, we know the timing until the reward reduction was about 287 days, (not a full year)

Based on this, we have about 7 more months until next block reduction – rate change to 10% annually (October 9th estimate)

This means we are currently now 27% complete with the 15% annual rate reward phase, which started around December 21, 2014

After October 9th, 2015: Assuming a similar minting participation rate, this will drop the increase in the money supply to an annual rate of about 8%

This will be a decrease of 33.33%

And in approximately 16 and a half months, (July 2016 estimate) we will see the rate change to 5% annually

After July 2016: Assuming a similar minting participation rate, this will drop the increase in the money supply to annual rate of about 4%

This will be a decrease of 50.00%

Keep in mind, minters also get an additional transaction fees bonus!

https://bitcointalk.org/index.php?topic=450381.msg10711008#msg10711008