Where has nearly all my spam gone?

[tehidyman]

For months I have received a minimum of 50 spam messages a day the majority from USA sources but relating to UK matters. I have never unsubscribed to them, just marked as junk in Thunderbird and they then automatically go into the junk folder.  For the last few days no US spam has arrived, just the French spam. I am happy not to receive but wondered if there is any explanation.  My email address is ****@AOL.com. and I train Thunderbird and use Spamassasin.  Anyone any thoughts?

[Glenn]

Ask AOL if they have increased the filtering