Carriers at Work, U.S.P.O.

6.9

/

1968

7.3

/

2020

7.2

/

2017

6.1

/

1993

6.6

/

2012

10

/

2007

6.5

/

2010

5.3

/

1990

7.1

/

1974

5.9

/

1982

6.1

/

2008

7.2

/

2012

7.471

/

1963

6.188

/

NaN

6.7

/

1985

7

/

1977

6.3

/

2011

6.674

/

2020

6

/

2016

5.1

/

2010