Table 14.

The quarterly average environmental efficiency and subsystem efficiency of airlines during 2021–2022

Airlines	Passenger	Freight	Overall
Aeroflot	[0.838, 0.958]	[0.920, 0.962]	[0.926, 0.968]
Air China	[0.965, 0.990]	[0.932, 0.970]	[0.933, 0.976]
All Nippon	[0.817, 0.832]	[0.921, 0.960]	[0.925, 0.974]
Cathay Pacific	[0.988, 0.990]	[0.900, 0.940]	[0.952, 0.998]
China Airlines	[0.951, 0.926]	[0.906, 0.954]	[0.951, 0.979]
China Eastern	[0.843, 0.981]	[0.784, 0.982]	[0.859, 0.872]
China Southern	[0.889, 0.977]	[0.851, 0.984]	[0.933, 0.943]
Eva Air	[0.901, 0.948]	[0.968, 0.984]	[0.982, 0.994]
Hainan	[0.957, 0.959]	[0.899, 0.966]	[0.912, 0.956]
Juneyao	[0.955, 0.992]	[0.929, 0.983]	[0.929, 0.947]
KLM Royal Dutch	[0.773, 0.909]	[0.940, 0.925]	[0.953, 0.986]
Lufthansa	[0.923, 0.943]	[0.820, 0.821]	[0.950, 0.977]
Singapore	[0.965, 0.926]	[0.831, 0.859]	[0.916, 0.987]
Spring	[0.961, 0.994]	[0.946, 0.992]	[0.922, 0.965]
Average	[0.909, 0.952]	[0.896, 0.949]	[0.932, 0.966]