Once natural population growth is factored in, it highlights even more distinctly how ineffective preaching is.
For instance, there has been discussion on the forum around why there is growth in some European countries, such as Germany. However, Germany only grew by 274 more than the population growth rate, after 29,326,324 hours of preaching, which means 107,157 hours of preaching were required per additional publisher.
A more meaningful figure may be the birth rate, which is currently 8.5 per 1000 people. The number of German JW babies would be about 1,393, whilst baptisms are 3,224. The difference of 1,831 needs to come from the territory, so the 29,326,324 preaching is 16,000 hours preaching per baptism from the field.
Please note, the figures are rough estimates. For instance, the birth rates really need to be from around 15 years ago, as that is the current batch of children being baptised. Also, the hours of studying with the children should be subtracted from the total hours of preaching when calculating the above figure. It is also possible that the JW birth rate differs from the general population.