Sorry for the noob question. I'm looking into SWDA but numbers don't add up, what am I missing?

Sorry for the noob question, I'm looking at SWDA (ISIN: IE00B4L5Y983) on the [ishare website](https://www.ishares.com/uk/individual/en/products/251882/ishares-msci-world-ucits-etf-acc-fund#/), on [yahoo finance](https://finance.yahoo.com/quote/IWDA.L/performance/), and on [justetf.com](https://www.justetf.com/en/etf-profile.html?isin=IE00B4L5Y983#overview) Annual returns seem to be all different to me... for example, for the range going from 31-12-2023 to 31-12-2024 ishare 18.70% yahoo 19.11% justetf 26.24% Which is it? And why are they all different? Thank you