1. Can we use the trend of the average accumulative depreciation to somehow guess the depreciation methods used by these companies?

2. How can we explain the increase in net average amount of long-lived assets from 2018 to 2019 is accompanied by a decrease in average accumulative depreciation from 2018 to 2019?

188.10 183.66 186.97 170.87 173.96 173.35 171.88 162.32 161.44 150 152.05 100 50 Avg. Long-Lived Assets Ending Balance (Net) (mil) Avg. Accumulated Depreciation Ending Balance (. - 185.49 152.56 154.54 147.48 150 146.99 144.39 147.88 146.56 139.73 141.22 100 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Year The trends of average of Accumulated Depreciation Ending Balance and average of Long-Lived Assets Ending Balance (Net) for Year. The view is filtered on Year, which ranges from 2010 to 2019