Chart 8. Annualized R-C-CPI-I inflation rate, by index population, 2006–22 (in percent)
Index population Annualized inflation rate

C-CPI-U

 2.21

R-C-CPI-I, Q1

 2.50

R-C-CPI-I, Q2

 2.35

R-C-CPI-I, Q3

 2.23

R-C-CPI-I, Q4

 2.16

R-C-CPI-I, Q5

 2.09

Note: R-C-CPI-I = Research Chained Consumer Price Index based on a Törnqvist formula, 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.