which freight rate is ZIM actually using? Definitely not WCI.

You can see from this 2 lowest point I had extracted WCI index in start Jan up to Apr. Which is the 1Q of 2024. Nothing is lower than $2600 TEU rate.. 1 Q should have been $3000 TEU if they are relying on WCI. How on earth do they report a $1492 TEU rate on average in their 1Q report if they using WCI?