Consider the following for the next two (02) items that follow: The expenditure (in suitable units) from 2011 to 2017 is: 2011: 13.8, 2012: 15.4, 2013: 10.4, 2014: 13.1, 2015: 15.8, 2016: 17.2, 2017: 19.4. How many times did the increase in expenditure in a year exceed 15% as compared to the previous year?