During which of these time periods was there a period of inflation

Inflation is the rate at which the general level of prices for goods and services is rising.

Explanation:

Looking at the past of the united states, the highest rate since the founding of the country occurred in 1778 and was higher than 29%. High inflation also occurred in 1917 when it was close to 20%.The US states are mandated to act on moderate inflation using different policy mechanisms and the patterns by which they will work to stabilize the inflation rate. Since 1980, economic policy has been relatively stable, and since the period above, the United States has enjoyed a low inflation rate.