McKesson Corporation ’s annual report for the year ended March 31, 2012, includes income statements for three years: ending on March 31, 2010, 2011, and 2012. Net income for these three years is as follows (all in millions): $1,263 (2010), $1,202 (2011), and $1,403 (2012). Further analysis of the same income statements reveals that revenues were the following amounts for these same years (all in millions): $108,702 (2010), $112,084 (2011), and $122,734 (2012). State each year’s net income as a percentage of revenues and comment briefly on the trend you see over the three-year period.