Methodological changes, as well as successive improvements made to group accommodation directories in some Provinces and/or Autonomous Communities, result in the data obtained from the date on which they are produced not being directly comparable with that published up until that point. Link coefficients are compiled in order to enable their comparability, thereby making it possible to compare data between the different years.
Explanatory document on the use of link coefficients
Improvements to the Canarias directory (June 2009), Comunidad Foral de Navarra (January 2011) and Extremadura (March 2011-February-2012). Link coefficients for Canarias (July 2010-June 2011), Comunidad Foral de Navarra (January 2011-December 2011) and Extremadura (March 2011-February-2012)