The heavy proportion of elderly persons in the district may be attributed to the settled way of life of those residents who arrived during the building boom of the 1960s: the children of these residents moved elsewhere to live, leaving their parents in the old dwelling. The skewed male–female ratio is probably an artifact of the differential between male and female lifespans in Lithuania (male average lifespan in Lithuania was 66 years in 2004, as against 78 for females), according to the World Health Organization.