As the relative proportion of the various sects is politically sensitive, Lebanon has not collected official census data on ethnic background since 1932 under the French Mandate. It is therefore difficult to have an exact demographic analysis of Lebanese society.[34] The largest concentration of people of Lebanese ancestry may be in Brazil having an estimated population of 5.8 to 7 million, but it may be an exaggeration, given that an official survey conducted by the Brazilian Institute of Geography and Statistics (IBGE) showed that less than 1 million Brazilians claimed any Middle-Eastern origin.[8] The Lebanese have always traveled the world, many of them settling permanently, most notably in the last two centuries.