O przestrzennym zróżnicowaniu struktur wieku ludności w Polsce, 1991-2011

The purpose of this article is description of demographic ageing using two methods: resemblance of structures and the measure of asymmetry for the years 1991, 2001 and 2011, for population of women and men separately and comparing results. Voivod ships with population ageing similarly rarely have formed spatially close areas, rather they formed clusters in various parts of the country. With passing time age structures by voivod ship started to resemble regressive type structure, but their dynamics was independent from the structure recorded in 1990. Population of majority of voivod ships located in the Eastern part of the country was older than population of Western voivod ships. Similarly, population of women was older than population of men. The comparative analysis of result leads to similar conclusions.