I'm 461, but I believe 462 will be the cut-off.
To reach 461, we need to clean more than 36 weeks of accumulated profiles, which is unrealistic in my opinion.
Note: This is considering a fairly uniform distribution in profiles between 461-470 range.
Update: When I say 36 weeks on Jun 26th to reach 461, is about the pink part:
2 weeks of accumulated profiles for 470-1200 +
2 weeks of accumulated profiles for 469 +
2 weeks of accumulated profiles for 468 +
2 weeks of accumulated profiles for 467 +
2 weeks of accumulated profiles for 466 +
2 weeks of accumulated profiles for 465 +
8 weeks of accumulated profiles for 464 +
8 weeks of accumulated profiles for 463 +
8 weeks of accumulated profiles for 462 +
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= 36 weeks of profiles accumulated from 462-1200
The draw in Jun, 12th cleaned around 29±3 weeks of accumulated profiles. My prediction is based on this number and the uniform distribution of in that range (461-470).