Each chart shows 4 trends, 1 for the past 5 years, 1 for the past 10, one for 15 and one for 20 years. It's possible to read off the approximate end value of percentage increase. It's also possible to get a feel for the overall trends by observing the slopes of each trend line.
Note that the Y axis scale max value changes with each chart based on the 20 year curve so the slopes are not directly comparable in this view. .
- Combining the two ideas of taking a cumulative view and drilling down on sub-components proves itself ot be most useful in helping us discover patterns previously not visible.
- Food inflation turned out much smoother than expected
- Energy was volatile but the cumulative approach still provided meaningful insights not otherwise available
- The wide variation in cumulative effects that we witnessed in Doug Shorts's 12 year chart also showed up in the series of charts below with some factors showing inflation rates far above the average value
- Many new questions were raised by the behavior we saw in the charts such as why are Medical and Tuition rising so relentlessly and smoothly and so fast while other categories show more variability?
|With this long view Food does that seem all that volatile or variable|
Key take away for me in this chart is the red line which shows doubling in energy prices over the past 10 years.
It is interesting to see how different public transportation is from Transportation as a whole. Public Transportation shows a smooth upward trend line despite high month to month volatility with a version to trend line slope following the recent recession. Overall, its cumulative effects are slightly higher than headline cpi
Other Goods and Services