Chart 2. Producer price index for airline passenger services, seasonal factors, 2018–20 annual seasonal revisions
Month 2018 2019 2020 (no action for COVID-19)

Jan

100.2 100.9 101.3

Feb

99.8 99.4 100.4

Mar

102.6 101.5 100.0

Apr

101.9 101.7 100.3

May

99.1 99.3 99.3

Jun

102.2 101.9 102.2

Jul

101.4 101.4 101.5

Aug

99.3 98.9 97.9

Sep

96.2 96.1 97.1

Oct

99.0 99.3 100.7

Nov

99.5 99.7 99.9

Dec

98.9 100.0 99.6

Note: COVID-19 = coronavirus disease 2019.

Source: U.S. Bureau of Labor Statistics.