Chart A-2. Comparison of R-C-CPI-I inflation rates by index population, 2006–22 (in percent)
Index population Annualized inflation rate
U Equivalized income Unequivalized income

C-CPI-U

 2.21 [1] [1]

R-C-CPI-I, Q1

 [1] 2.50 2.52

R-C-CPI-I, Q2

 [1] 2.35 2.33

R-C-CPI-I, Q3

 [1] 2.23 2.26

R-C-CPI-I, Q4

 [1] 2.16 2.14

R-C-CPI-I, Q5

 [1] 2.09 2.10

[1] Not applicable.

Note: R-C-CPI-I = Research Chained Consumer Price Index based on a Törnqvist formula, U = urban population (published index), C-CPI-U = Chained Consumer Price Index for All Urban Consumers, Q1 = first quintile (lowest 20 percent), Q2 = second quintile (second 20 percent), Q3 = third quintile (third 20 percent), Q4 = fourth quintile (fourth 20 percent), Q5 = fifth quintile (highest 20 percent).

Source: U.S. Bureau of Labor Statistics.