The low inflation we have experienced since 1990 in not normal for the U.S.A.
It is mostly caused by not having minimum wage tied to any inflation gage and the change in 1981 to remove asset prices from CPI (you only need to rent, no one needs to own, well that is the thinking behind this change, you like it?).
Also China has helped to kill low skilled jobs and keep inflation artificially low (remember this is what we use to calculate 90% of inflation now),