November 2007 membership statistics, just released, show that the ESSWE membership is heavily concentrated in the Netherlands, the United States, and the United Kingdom.
In November 2007, the ESSWE had 217 members, of whom 52 (24%) were resident outside Europe (29 in the USA, and 23 elsewhere).
More than 5o% of the members resident in Europe came from just two countries: the Netherlands (44) and the United Kingdom (42). Adding three further countries (Germany, France, and Denmark) accounts for 80% of the European members. 12 other countries, with between 1 and 5 members each, made up only 20% of the membership.