Table 11.

Overall quarterly environmental efficiency of the IEBM model during 2021–2022

Airlines	2021			2022
	Q2	Q3	Q4	Q1	Q2	Q3	Q4
Aeroflot	[0.797, 0.900]	[0.790, 0.902]	[0.896, 0.944]	[0.934, 1.000]	[0.998, 1.000]	[0.990, 1.000]	[1.000, 1.000]
Air China	[0.932, 0.962]	[0.932, 0.976]	[0.946, 1.000]	[0.938, 1.000]	[0.926, 0.999]	[0.959, 0.998]	[0.955, 0.996]
All Nippon	[0.912, 0.922]	[0.911, 0.979]	[0.909, 1.000]	[0.909, 0.916]	[0.917, 1.000]	[0.921, 0.991]	[0.924, 0.983]
Cathay Pacific	[0.993, 1.000]	[0.990, 0.994]	[0.992, 1.000]	[0.906, 1.000]	[0.907, 1.000]	[0.914, 0.996]	[0.911, 0.995]
China Airlines	[1.000, 1.000]	[0.934, 0.976]	[0.989, 1.000]	[1.000, 1.000]	[0.972, 1.000]	[0.943, 1.000]	[0.917, 1.000]
China Eastern	[0.855, 0.877]	[0.839, 0.868]	[0.822, 0.861]	[0.854, 0.859]	[0.866, 0.870]	[0.874, 0.874]	[0.881, 0.882]
China Southern	[0.929, 0.938]	[0.930, 0.941]	[0.931, 0.946]	[0.913, 0.932]	[0.916, 0.943]	[0.919, 0.920]	[0.923, 0.923]
Eva Air	[0.938, 1.000]	[0.951, 0.952]	[0.971, 1.000]	[1.000, 1.000]	[0.999, 1.000]	[0.999, 1.000]	[1.000, 1.000]
Hainan	[0.908, 0.915]	[0.900, 0.950]	[0.893, 1.000]	[0.887, 0.906]	[0.909, 0.983]	[0.915, 0.963]	[0.922, 0.965]
Juneyao	[0.925, 0.940]	[0.924, 0.949]	[0.922, 1.000]	[0.927, 0.939]	[0.944, 0.947]	[0.935, 0.943]	[0.940, 0.948]
KLM Royal Dutch	[0.948, 0.960]	[0.971, 0.972]	[0.984, 1.000]	[0.954, 1.000]	[0.938, 0.996]	[0.923, 0.984]	[0.908, 0.974]
Lufthansa	[0.924, 0.937]	[0.915, 0.942]	[0.948, 1.000]	[0.957, 0.982]	[0.970, 0.987]	[0.951, 1.000]	[0.938, 0.965]
Singapore	[0.985, 1.000]	[0.990, 1.000]	[0.994, 1.000]	[0.816, 1.000]	[0.830, 0.970]	[0.848, 0.966]	[0.865, 0.961]
Spring	[0.922, 0.933]	[0.923, 0.970]	[0.946, 1.000]	[0.901, 0.974]	[0.904, 0.942]	[0.941, 1.000]	[0.943, 1.000]
Mean	[0.926, 0.949]	[0.921, 0.955]	[0.939, 0.982]	[0.921, 0.965]	[0.928, 0.974]	[0.931, 0.974]	[0.931, 0.971]