According to the U.S. Bureau of Labor Statistics, prices for intracity mass transit were 21.92% higher in 2021 versus 2009 (a $4.38 difference in value).

**Between 2009 and 2021:** Intracity mass transit experienced an average inflation rate of 1.67% per year.
In other words, intracity mass transit costing $20 in the year 2009 would cost $24.38 in 2021 for an equivalent purchase.
Compared to the overall inflation rate of 1.72% during this same period, inflation for intracity mass transit was
lower.

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 | 121.922 |

Women's apparel · Fresh fruits · Jewelry · Fish and seafood ·

Below are calculations of equivalent buying power for Intracity mass transit, over time, for $20 beginning in 2009. Each of the amounts below is equivalent in terms of what it could buy at the time:

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

2009 | $20.00 | - |

2010 | $20.54 | 2.71% |

2011 | $21.67 | 5.48% |

2012 | $22.21 | 2.51% |

2013 | $23.19 | 4.40% |

2014 | $23.50 | 1.32% |

2015 | $24.03 | 2.28% |

2016 | $24.47 | 1.82% |

2017 | $24.91 | 1.78% |

2018 | $25.60 | 2.80% |

2019 | $25.96 | 1.40% |

2020 | $25.15 | -3.14% |

2021 | $24.38 | -3.03%* |

CPI in 2021 / CPI in 2009 * 2009 USD value = 2021 USD value

Then plug in historical CPI values from above. The CPI for Intracity mass transit was 100.000 in the year 2009 and 121.922 in 2021:

121.922 / 100.000 * $20 =

Therefore, according to U.S. Bureau of Labor Statistics, $20 in 2009 has the same "purchasing power" as $24.38 in 2021 (in the CPI category of Intracity mass transit).