Hi. I am trying to determine a historical average CPI for the USA. The average would ideally include as many years as possible, anywhere between 50 to 90 I suspect would provide a representative average. I understand that many use 3 percent as an assumed rate of inflation, but I want to compare that number with the historical average CPI. If you know of a calculator that can provide this information, that would be great. The calculators I have seen are more designed to tell you what the value of money is between a start date and an end date and factoring in inflation. Also, are there any predicted trends regarding the future rate of inflation? Thanks.