This years Yearbook covers "Albainia" as I read these experiences I get to around 1920-25 and I notice that 3 or 4 healthy congregations turn into just 13-14 publishers by 1926 after "a time of trouble." Although not mentioned this "trouble" was Rutherford's "Millions now living will never die" campaign with the Watchtower saying Armagedon was coming in 1925. Most european Congregations by 1926 lost WHOLE congregations with only 3-10 "faithful " remaining {e.g Poland, Romania yearbook experiences} Notice how the graph starts from the 1940's to avoid and cover up showing the FLAT LINED Publisher figures after 1925.....{notice also dips after 1975}
However, check out the 2006 Yearbook page 80. Romania graph, and you see a FLAT LINED publisher figure at 1926. The Witnesses had to start from scratch. Also a huge dip after 1975. {sorry no scanner}
After making huge progress Rutherford nearly cut his organisation in half...and only 8 years after Russell's death and the first great "apostasy."