@sir82 the changing political situation in eastern europe and the change for the better for the JW's during the 90's, as well as their growth, is a well known fact.
Just take a look at the yearbooks and check it yourself,.. i just grabbed two yearbooks ('94 and '96) from the 90's (figures of 1993 and 1995) from the bookshelf reporting 29% growth in 1993 for the countries of the former Soviet Union in 1995 50% growth in the 10 countries of the former Soviet Union
Also there are studies about the changing in households as i mentioned.
In my country (a typical industrialised western democracy with a thriving economy) a special government agency, called the central bureau of statistics, keeps track of such data and its a fact that nowadays both spouses work instead of just one with a main income during previous decades.
That means that in previous decades much more people were at home during the days.