The annual per capita out-of-pocket expenses (to the nearest dollar) for U.S. health care for selected years from 2013 and projected to 2021 are shown in the table and figure. Year Dollars Dollars per year 1300 1200 1100 1000 2013 1020 2015 1022 2017 1097 2019 1209 2021 1325 2013- 2015- 2017- 2019+ 2021 Year (a) Use n = 4 equal subdivisions and left-hand endpoints to estimate the area under the graph from 2013 to 2021. (b) What does this area represent in terms of per capita out-of-pocket expenses for U.S. health care? This represents the total per capital out-of-pocket expenses for health care between 2013 and 2021. This represents the total per capital out-of-pocket expenses for health care between 2013 and 2019. This represents the average per capital out-of-pocket expenses for health care between 2013 and 2021. This represents the average per capital out-of-pocket expenses for health care between 2013 and 2019. This represents the total per capital out-of-pocket expenses for health care between 2015 and 2021.