Plot annually since 1950 the reciprocal of the consumer price index (FRED code: CPIAUCSL) to see how inflation erodes the purchasing power of money. To start with an initial value of 1.0, in the Units dropdown box in FRED, select the option “Index (Scale to value to 100 for the chosen date)” and then apply the formula “(1/a)*100”. If a dollar bought one unit of goods and serves in 1950, as of which year did the dollar buy only one-half unit? As of 2015, how many units of goods and services did a dollar buy?(