The highest consumer price index based on the graph was 3.6% and it occurred in 1993.
Based on the graph, the highest consumer price index (CPI) over the six-year period was 3.6% and it occurred in 1993.
Here's how the following answer was arrived:
1. Identify the trend line for the CPI: The orange line in the graph represents the CPI.
2. Locate the peak of the CPI line: Look for the highest point on the orange line. In this case, the peak is reached in 1993.
3. Read the CPI value at the peak: The vertical axis labels the CPI values. Align the peak of the orange line with the vertical axis to determine the corresponding CPI value. In this case, the CPI value at the peak is approximately 3.6%.
Therefore, the highest consumer price index based on the graph was 3.6% and it occurred in 1993.