As of writing, head block is 9103018, according to this comment, current inflation rate is 9.42%

/**
* At block 7,000,000 have a 9.5% instantaneous inflation 
* rate, decreasing to 0.95% at a rate of 0.01%
* every 250k blocks. This narrowing will take approximately 
* 20.5 years and will complete on block 220,750,000
*/