I asked my PIMO cousin , who is a MS in a large northern UK city.
He says his congregation has approx 140 publishers ( it recently has been enlarged as a nearby congregation was disbanded and re-distributed to 4 others ) but meeting attendances are typically 80 or 90. Sometimes , for example if the weather is really bad or good it can be as low as 70. Who wants to go to a boring meeting on a lovely sunny Sunday afternoon when you could be in the garden or even down the beach?
The waters are muddied a bit as many ( about 20 ) listen in on the telephone ( or at least , claim to ) and are included in the official attendance figures for the society ( which often aren't announced.)
We discussed that when we were young , missing a meeting simply wasn't an option. Ever. I can think of many occasions when my parents went through 10 foot snow drifts , power cuts , walked an hour to the KH if the car had broken down etc. On the rare occasions we went away for the weekend ( for example , to see a older "worldly" relative ) , we would visit the local kingdom hall. Times have long changed.
He gave the example of an elder in his congregation who is a friend and neighbour of his. The elder & his wife ( who is a regular auxiliary pioneer ) would be regarded as strong , "exemplary" JWs , but quite regularly miss meetings. His wife has one of the ME style depressive conditions very common amongst JWs , so often just "listens in" on the phone. They go away for at least one weekend a month on short holiday breaks , to visit relatives or to take in shows. The husband will quite regularly miss the midweek meeting given half a chance , especially if his football ( soccer ) team is live on the TV! He has a sales rep job that often involves travelling away overnight so nobody really asks any questions or gossips about them - frankly , most in the congregation do the same , ducking and diving the meetings as required.
All of this is anecdotal , but the impression I get is that meeting attendance , other than the Memorial & assemblies ( which are the main events that everyone attends ) is really poor now. The Love of the Greater Number definitely is cooling off!