Prices in the Chicago-Naperville-Elgin area, as measured by the Consumer Price Index for All Urban Consumers (CPI-U), advanced 0.4 percent in May, the U.S. Bureau of Labor Statistics reported today. (See table A.) Regional Commissioner Jason Palmer noted that increases in the indexes for shelter, electricity, and food away from home were contributing factors. The indexes for household furnishings and operations and food at home were lower in May. (Data in this report are not seasonally adjusted. Accordingly, month-to-month changes may reflect the impact of seasonal influences.)

Over the last 12 months, the CPI-U advanced 3.1 percent. (See chart 1 and table A.) The index for all items less food and energy rose 3.3 percent over the year. Energy prices advanced 2.0 percent over the year, and food prices increased 1.5 percent. (See table 1.)

  

View Chart Data

Chart 1. Over-the-year percent change in CPI-U, Chicago-Naperville-Elgin, IL-IN-WI, May 2021–May 2024

Month	All items	All items less food and energy
May 2021	4.7	3.1
Jun 2021	4.7	2.9
Jul 2021	4.9	3.1
Aug 2021	4.8	2.6
Sep 2021	4.5	2.3
Oct 2021	5.3	3.1
Nov 2021	6.0	3.5
Dec 2021	6.6	4.4
Jan 2022	6.8	4.8
Feb 2022	7.1	5.2
Mar 2022	7.8	5.3
Apr 2022	7.2	4.8
May 2022	8.0	4.7
Jun 2022	8.9	5.0
Jul 2022	8.4	5.0
Aug 2022	8.3	6.0
Sep 2022	8.2	6.4
Oct 2022	7.7	6.1
Nov 2022	6.8	5.7
Dec 2022	5.5	5.3
Jan 2023	5.4	5.3
Feb 2023	5.0	5.0
Mar 2023	4.4	5.5
Apr 2023	4.8	5.6
May 2023	3.3	5.2
Jun 2023	2.1	5.1
Jul 2023	2.2	4.7
Aug 2023	2.3	4.0
Sep 2023	2.3	3.6
Oct 2023	2.4	4.1
Nov 2023	2.5	4.1
Dec 2023	3.3	4.1
Jan 2024	3.3	3.9
Feb 2024	3.4	3.8
Mar 2024	3.1	3.2
Apr 2024	3.0	3.3
May 2024	3.1	3.3

Food prices decreased 0.1 percent for the month of May. A 1.0 percent increase in the index for food away from home (restaurant, cafeteria, and vending purchases) nearly offset a 0.8 percent decline in the index for food at home (groceries). Within the food at home group, categories experiencing declines included snacks, other meats, and other uncooked poultry including turkey. Indexes were higher for coffee; chicken; and spices, seasonings, condiments, and sauces.

Over the year, food prices rose 1.5 percent. Prices for food at home advanced 1.1 percent since a year ago. Three of the six major grocery store food group indexes increased over the year. The index for other food at home (includes sugar, sweets, fats, and oils, for example) rose 3.2 percent, nonalcoholic beverages and beverage materials increased 4.4 percent, and cereals and bakery products was up 1.9 percent. Prices for food away from home advanced 2.1 percent.

The energy index advanced 1.9 percent over the month. The increase was mainly due to a 4.6 percent rise in the index for electricity. Prices for utility (piped) gas service advanced 0.9 percent, and prices for gasoline rose 0.7 percent for the same period.

Energy prices advanced 2.0 percent over the year, largely due to an increase in the electricity index (+4.3 percent). Prices paid for utility (piped) gas service increased 1.6 percent, while prices for gasoline fell 0.3 percent during the past year.

The index for all items less food and energy rose 0.4 percent in May. Increases in the indexes for shelter (+0.7 percent); public transportation; and tuition, other school fees, and childcare (+0.7 percent) were contributing factors. The index for household furnishings and operations declined 1.4 percent in May.

Over the year, the index for all items less food and energy rose 3.3 percent. Components contributing to the increase included shelter (+5.3 percent) and other goods and services (+9.4 percent). Partly offsetting the increases were declines in the indexes for household furnishings and operations (-4.4 percent) and new and used motor vehicles (-4.3 percent).

The June 2024 Consumer Price Index for the Chicago-Naperville-Elgin area is scheduled to be released on Thursday, July 11, 2024.

The Consumer Price Index for Chicago is published monthly. The Consumer Price Index (CPI) is a measure of the average change in prices over time in a fixed market basket of goods and services. The Bureau of Labor Statistics publishes CPIs for two population groups: (1) a CPI for All Urban Consumers (CPI-U) which covers approximately 93 percent of the total U.S. population and (2) a CPI for Urban Wage Earners and Clerical Workers (CPI-W) which covers approximately 29 percent of the total U.S. population. The CPI-U includes, in addition to wage earners and clerical workers, groups such as professional, managerial, and technical workers, the self-employed, short-term workers, the unemployed, and retirees and others not in the labor force.

The CPI is based on prices of food, clothing, shelter, fuels, transportation fares, charges for doctors' and dentists' services, drugs, and the other goods and services that people buy for day-to-day living. Each month, prices are collected in 75 urban areas across the country from about 6,000 housing units and approximately 22,000 retail establishments—department stores, supermarkets, hospitals, filling stations, and other types of stores and service establishments. All taxes directly associated with the purchase and use of items are included in the index.

The index measures price changes from a designated reference date; for most of the CPI-U the reference base is 1982-84 equals 100. An increase of 7 percent from the reference base, for example, is shown as 107.000.  Alternatively, that relationship can also be expressed as the price of a base period market basket of goods and services rising from $100 to $107. For further details see the CPI home page on the internet at www.bls.gov/cpi and the CPI section of the BLS Handbook of Methods available on the internet at www.bls.gov/opub/hom/cpi/.

In calculating the index, price changes for the various items in each location are averaged together with weights that represent their importance in the spending of the appropriate population group. Local data are then combined to obtain a U.S. city average. Because the sample size of a local area is smaller, the local area index is subject to substantially more sampling and other measurement error than the national index. In addition, local indexes are not adjusted for seasonal influences. As a result, local area indexes show greater volatility than the national index, although their long-term trends are quite similar. NOTE: Area indexes do not measure differences in the level of prices between cities; they only measure the average change in prices for each area since the base period.

The Chicago-Gary-Kenosha, IL-IN-WI Core Based Statistical Area includes Cook, DeKalb, DuPage, Grundy, Kane, Kendall, Lake, McHenry, and Will Counties in Illinois; Jasper, Lake, Newton, and Porter Counties in Indiana; and Kenosha County in Wisconsin.

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