physical inactivity level estimate based on Hallal, Pedro C, Lars Bo Andersen, Fiona C Bull, Regina Guthold, William Haskell, and Ulf Ekelund. 2012. "Global Physical Activity Levels: Surveillance Progress, Pitfalls, and Prospects." The Lancet 380 (9838):247-57. https://doi.org/10.1016/S0140-6736(12)60646-1.