I agree Dozy,
I honestly can't remember the last person who was baptised who wasn't a child of a JW or had some other family connection (other than an occasional social misfit who had been contacted in the ministry). http://www.britishpathe.com/record.php?id=43578 - Contrast that with the early 60's...a video that also illustrates many of the points made by earlier posters about the fun times as assemblies & meetings in the past.
Great newsreel!
Much of the US west coast growth has been in the Spanish Halls. Most of the new converts are uneducated with no access to the internet.