|2018||10.4||7.1 (p)||3.1 (p)||2.8 (p)|
|2017||6.3||3.5 (p)||2.4 (p)||2.3 (p)|
|2016||5.7||1.9||2.3 (p)||2.3 (p)|
|2015||2.4||-0.2||4.0 (b)||3.5 (b)|
|2014||-2.6||-2.0||2.1 (b)||2.1 (b)|
|2012||-6.8||-3.0||2.0 (b)||1.8 (b)|
|2011||-1.0||1.4||1.4 (b)||1.4 (b)|
|2008||12.1||9.5||3.0 (b)||2.4 (b)|
|2001||21.5||7.9||3.3 (b)||1.0 (b)|
|Units: Per 1.000 inhabitants.|
|Source Catalonia: Idescat. Source Spain, eurozone and European Union: Eurostat.|
|(b) Break in time series.|
|(p) Provisional value.|
|(e) Estimated value.|
Net migration: The difference between immigration into and emigration from the area during the year (net migration is therefore negative when the number of emigrants exceeds the number of immigrants). Since most countries either do not have accurate figures on immigration and emigration or have no figures at all, net migration is generally estimated on the basis of the difference between populationgrwoth and natural growth (in the Eurostat database, it is then called net migration including corrections). The statistics on net migration are therefore affected by all the statistical inaccuracies in the two components of this equation, especially population growth.
Population growth: The difference between the size of the population at the beginning and end of a period. It is equal to the algebraic sum of natural growth and net migration (including corrections). There is negative change when both of these components are negative or when one is negative and has a higher absolute value than the other.
Natural growth: The difference between the number of live births and the number of deaths during the year. The natural growth is positive when the number of births is higher than the number of deaths, and it is negative when the opposite holds true.
The data for Catalonia have been calculated using population estimates and figures on natural population movement, and statistical corrections have been applied.