From the US Bureau of Labor Statistics:
Starting with January 2023 data, the BLS plans to update weights annually for the Consumer Price Index based on a single calendar year of data, using consumer expenditure data from 2021. This reflects a change from prior practice of updating weights biennially using two years of expenditure data.
The Consumer Price Index (CPI) is a measure of the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services. Indexes are available for the U.S. and various geographic areas. Average price data for select utility, automotive fuel, and food items are also available. Payroll employment increased by 517,000 in January 2023.
In December, the Consumer Price Index for All Urban Consumers decreased 0.1 percent, seasonally adjusted, and rose 6.5 percent over the last 12 months, not seasonally adjusted. The index for all items less food and energy increased 0.3 percent in December (SA); up 5.7 percent over the year (NSA).
Consumer prices for all items rose 6.5 percent from December 2021 to December 2022. Food prices increased 10.4 percent, reflecting an 11.8-percent increase in prices for food at home and an 8.3-percent increase in prices for food away from home.