Here are some recent data on the U.S. consumer price index:
Year CPI
1999 166.6
2000 172.2
2001 177.1
2002 179.9
Compute the inflation rate for each year 1999-2002 and determine which years were years of inflation. In which years did deflation occur? In which years did disinflation occur? Was there hyperinflation in any year?