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Well , the majority of those couples do n't have sex as an automatic out , and learn a few coping strategies before having to deal with another person.Basically , the percentages are the way they are because the majority of the US population has never learned how to have a discussion without making it a hurtful argument , never learned coping strategies , never learned to find the root cause of a problem , and never learned to keep blame out of the way . Briefly , these data showed that between 1992 and 1996 , the percentage of students performing at proficiency level 2 or above statewide increased in both mathematics and science at all three grade levels tested ( 4 , 8 , and 10 ) . At the twelfth grade , the percentages of students attaining the three achievement levels do not show change for any racial / ethnic subgroup . For both measures , the percentages for New York and Houston do not show a difference when compared to either the national or central city average . At one school , the percentages of students overall scoring at proficient levels were 81 percent in language arts and 73 percent in math , but the subgroups of English language learners and students with disabilities at the school did not meet state benchmarks , so the school fell short of making AYP . For example , the percentages who reported carrying a gun within the last 30 days were 12.4 for the computer survey and 7.9 for the paper survey . In Illinois and Michigan , the percentage of low-income seniors without drug coverage ( 34 % and 38 % , respectively ) was at least as high as that in states without pharmacy assistance programs . The construction and administration of prisons , the percentage of the population on welfare , the cost of providing health care to indigents and others who need it and ca n't afford it . When GINI experiences any kind of input interruption , the percentage of data processed is checked against threshold values preset by the operator . Frankenburg contends that one can judge the usefulness of a screening instrument using two criteria : first , the percentage of people having the condition who are classified as having it on the basis of their test scores ( this he refers to as the test 's sensitivity ) ; secondly , the percentage of those classified as having the condition on the basis of their test scores who actually have the condition on the basis of their test scores who actually have the condition ( this he refers to as the test 's specificity ) .