This isn't quite right. The rate of production has increased, because the computing power is increasing at a very high rate between difficulty adjustments. Blocks are being solved faster than they are "supposed" to be, statistically.
It won't last, eventually the increase in computing power will taper off, but that's the state of things at the moment.
It won't last, eventually the increase in computing power will taper off, but that's the state of things at the moment.