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.
Thirty-seven percent of the population claims to be exclusively white, and 11 percent is classified as negro.. The remaining 1 percent is Chinese, the result of the importation of 132,000 Chinese indentured laborers between 1853 and 1872 to replace the loss of labor caused by the impending end of African slavery.