How does Texas Instruments' cost management compare year-over-year?

Texas Instruments' cost management has shown improvement in operating margin and gross margin, but a slight decline in net margin over the past two years: |code|Ticker|Name|Date|Gross Profit Margin|Operating Profit Margin|Net Profit Margin|market_code| |---|---|---|---|---|---|---|---| |TXN|TXN.O|Texas Instruments|2023 Q1|65.3802|42.612468600137014|39.0043|185| |TXN|TXN.O|Texas Instruments|2023 Q2|64.7924|42.07631874298541|38.4961|185| |TXN|TXN.O|Texas Instruments|2023 Q3|63.8893|41.23642315131677|38.2309|185| |TXN|TXN.O|Texas Instruments|2023 Q4|62.8974|39.83104058450825|37.1597|185| |TXN|TXN.O|Texas Instruments|2024 Q1|57.2248|31.95848128926523|30.183|185| |TXN|TXN.O|Texas Instruments|2024 Q2|57.5438|30.56260857944675|29.8276|185| |TXN|TXN.O|Texas Instruments|2024 Q3|58.2775|31.889290012033694|30.8922|185| |TXN|TXN.O|Texas Instruments|2024 Q4|58.1421|31.692347036634487|30.6822|185|