According to the U.S. Bureau of Labor Statistics, prices for intracity mass transit were 3.07% lower in 2021 versus 2018 (a $0.61 difference in value).

**Between 2018 and 2021:** Intracity mass transit experienced an average inflation rate of -1.03% per year.
In other words, intracity mass transit costing $20 in the year 2018 would cost $19.39 in 2021 for an equivalent purchase.
Compared to the overall inflation rate of 1.97% during this same period, inflation for intracity mass transit was
significantly lower.

**In the year 2018:** Pricing changed by 2.80%, which is
significantly above the average yearly
change for intracity mass transit during the 2018-2021 time period.
Compared to inflation for all items in 2018 (2.44%), inflation for intracity mass transit was
higher.

Raw Consumer Price Index data from U.S. Bureau of Labor Statistics for *Intracity mass transit*:

Year |
2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 |

CPI |
100.000 | 102.707 | 108.338 | 111.061 | 115.953 | 117.481 | 120.157 | 122.349 | 124.527 | 128.013 | 129.808 | 125.732 | 124.079 |

Rent of primary residence · Medical care · Gasoline (all types) · Denver, Colorado ·

Below are calculations of equivalent buying power for Intracity mass transit, over time, for $20 beginning in 2018. Each of the amounts below is equivalent in terms of what it could buy at the time:

Year | USD Value | Inflation Rate |
---|---|---|

2018 | $20.00 | 2.80% |

2019 | $20.28 | 1.40% |

2020 | $19.64 | -3.14% |

2021 | $19.39 | -1.31%* |

CPI in 2021 / CPI in 2018 * 2018 USD value = 2021 USD value

Then plug in historical CPI values from above. The CPI for Intracity mass transit was 128.013 in the year 2018 and 124.079 in 2021:

124.079 / 128.013 * $20 =

Therefore, according to U.S. Bureau of Labor Statistics, $20 in 2018 has the same "purchasing power" as $19.39 in 2021 (in the CPI category of Intracity mass transit).