I don't see how baptisms can be used to calculate how many fall away.
The publishers figure already includes EVERYBODY who got baptized that year, the baptism figure can't be added to the previous publisher figure.
I started in FS in 1976. I handed in monthly FS reports but did not get baptzed until 1978. But since I was a publisher the 1977 figure included me. In 1978 the publisher figure included me. I got baptized that year as did my brother but you could not ADD that years baptisms to the publisher figure because those getting baptized were already included in the publisher figure. Otherwise you are counting baptized publishers twice.
So am I missing something?