Figure 4. Pulmonary functions (FVC % predicted values) by individual participants in the study group, with the same numbering system as used in Figure 3. Light gray bars indicate the 2007 value for decedents, indicated in the top row above the appropriate histogram bar. Hatched bars indicate a 2011 increase in the 2007 value. Dark gray bars indicate the magnitude of decrease of pulmonary function in 2011 compared with the 2007 value, the latter being the sum of light gray and dark gray bars.