50 days in what is Biden’s net approval rating?

Here’s the net approval ratings for recent US Presidents after 50 days:

1. Johnson +72%
2. Kennedy +66%
3. Carter +61%
4. Eisenhower +59%
5. Nixon +54%
6. Bush GHW +50%
7. Bush GW +39%
8. Reagan +37%
9. Obama +32%
10. Clinton +31%
11. Ford +19%
12. Biden +15%
13. Trump -5%

So positive, but relatively low. I suspect partisanship in the US means no new President will ever get a net approval rating of over say +20% so they get judged off their party, not their performance.