This tactile feedback is related to a difference in tis-sue density as one goes from the parenchyma to the vessels or from the parenchyma to the collecting sys-tem, and also to the selectivity of the CUSA to spare tissue of high collagen content.
1 In the least developed countries, the overall illiteracy rate is 49 percent. 2  52 percent of all non-literates live in India and China. 3  Africa as a continent has a literacy rate of less than 60 percent. 4  In Sub-Saharan Africa since 1980, primary school enrollment has declined, going from 58 percent to 50 percent.
The adult illiteracy rate is the percentage of illiterates and semi-illiterates. in a population aged 15 years and over. Table 4 and Figures 2 and 3 present gender differences in terms of adult illiteracy rates. disaggregated by rural and urban areas, by gender and by age in the selected years of 1982, 1990. and 2000.