The period over which the data underlying Figures 1.1, 1.2 and 1.3 of 'UK Air Passenger Demand and CO2 Forecasts 2009' were collected is set out in Chapter 2 of the same report, with further detail in Annexes A-D.
Box 2.2 (p. 16) explains that the forecast shown in Figure 1.1 is based on data from the period 1984-2004. Page 26 explains that the airport choice model used in producing the forecast shown in Figures 1.2 and 1.3 is based on cross-sectional data for 2005.
Figure 1.3 illustrates the forecasting model's success in predicting movements in passenger demand since 2005.