nostr:npub1wsvtcgh5d4gk7jclvccyln9psvafc0r799raevn6mku84hrr0nkqwq0453 
Well, the official reason the USG changes the way they count inflation is because people's spending habits change over the years. The weights are several pages down in this file
https://www.bls.gov/news.release/pdf/cpi.pdf
in Tables 1 and 2.

That said, I still believe this
http://www.shadowstats.com/alternate_data/inflation-charts
more than the official numbers.