1976 National Household Sample Survey (PNAD) and the July 1998 Monthly Employment Survey (PME) have been analyzed to assess how Brazilians think of themselves in racial terms. The IBGE thought the data might be used to adjust classifications on the census (neither survey, however, resulted in changes to the Census classifications). Data Folha has also conducted research on this subject. The results of these surveys are somewhat varied, but seem to coincide in some fundamental aspects. First, a great number of racial terms are in use in Brazil, indicating a flexibility in thinking about the topic. The 1976 PNAD found that people responded with a total of 136 different terms to the question about race; the July 1998 PME found 143. However, most of these terms are used by small numbers of people. Telles notes that 95% of the population used one of 6 different terms for people of color and at least some African ancestry (branco, moreno, pardo, moreno-claro, preto and negro). Petruccelli shows that the 7 most common responses (the above plus amarela) sum up 97% of responses, and the 10 most common (the previous plus mulata, clara, and morena-escura - dark brunette) make 99%. Petruccelli, analysing the July 98 PME, finds that 77 denominations were mentioned by only one person in the sample. Twelve are misunderstandings, as respondents used terms of national or regional origin (francesa, italiana, baiana, cearense). Many of the racial terms are (or could be) remarks about the relation between skin colour and exposure to sun (amorenada, bem morena, branca-morena, branca-queimada, corada, bronzeada, meio morena, morena-bronzeada, morena-trigueira, morenada, morenão, moreninha, pouco morena, queimada, queimada de sol, tostada, rosa queimada, tostada). Others are clearly variations of the same idea (preto, negro, escuro, crioulo, retinto, for black, alva, clara, cor-de-leite, galega, rosa, rosada, pálida, for White, parda, mulata, mestiça, mista, for parda), or refinements of the same concept (branca morena, branca clara), and can be grouped together with one of the chiefly used racial terms without falsifying the interpretation. Some responses seem to express an outright refusal of classification: azul-marinho ("navy blue"), azul ("blue"), verde ("green"), cor-de-burro-quando-foge. In the July 1998 PME, the categories Afro-Brasileiro ("Afro-Brazilian") and Africano Brasileiro ("African Brazilian") were not used at all; the category Africano ("African") was used by 0.004% of the respondents. In the 1976 PNAD, none of these terms was used even once. The notable difference in the popular system