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.
They comprise 6 percent of the population. 56%. Percentage of people ages 21 to 64 having some type of disability and also employed in the last year. The rate ranged from 82 percent of those with a nonsevere disability to 43 percent with a severe disability. For those without a disability, the rate is 88 percent.