The number of Web-databases has exploded during the last years. In order to justify the development of new information resources, it is essential to know if the use of existing resources has followed a similar trend. This paper presents an analysis of the use of a national statistical web-database made to support Web site improvement. The study is based on user registration and log data taken during 2 periods in 1999 and 2000, during which the number of users increased 5-fold and the number of sessions more than doubled. During September 2000, each active user spent an average of 7 hours and logged 25 sessions. Session definition was difficult since the log data was based on registered organizations, rather than on tasks or individuals. We have used a topic-session, defined as the sequence of requests from topic initiation to retrieval of data from this topic, as a task approximation.