Frequencies for first 10,000 rows of city variable in nsrd dataset :

     City/Station Name |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
AMBLER                 |        260        2.60        2.60
ANCHORAGE INTL AP      |        260        2.60        5.20
ANCHORAGE MERRILL FIEL |        260        2.60        7.80
ANCHORAGE/ELMENDORF    |        260        2.60       10.40
ANIAK AIRPORT          |        260        2.60       13.00
BARROW W POST-W ROGERS |        260        2.60       15.60
BETHEL AIRPORT         |        260        2.60       18.20
BETTLES FIELD          |        260        2.60       20.80
BIG DELTA ALLEN AAF    |        260        2.60       23.40
CHULITNA               |        260        2.60       26.00
DEADHORSE              |        260        2.60       28.60
EMMONAK                |        260        2.60       31.20
FAIRBANKS INTL ARPT    |        260        2.60       33.80
FAIRBANKS/EIELSON A    |        260        2.60       36.40
FORT YUKON             |        260        2.60       39.00
GAMBELL                |        260        2.60       41.60
GULKANA INTERMEDIATE F |        260        2.60       44.20
HAYES RIVER            |        260        2.60       46.80
HEALY RIVER AIRPORT    |        260        2.60       49.40
HOONAH                 |        260        2.60       52.00
HOOPER BAY             |        260        2.60       54.60
KENAI MUNICIPAL AP     |        260        2.60       57.20
KOTZEBUE RALPH WEIN ME |        260        2.60       59.80
MCGRATH ARPT           |        260        2.60       62.40
MEKORYUK               |        260        2.60       65.00
MINCHUMINA             |        260        2.60       67.60
NENANA MUNICIPAL AP    |        260        2.60       70.20
NOME MUNICIPAL ARPT    |        260        2.60       72.80
NORTHWAY AIRPORT       |        120        1.20       74.00
PALMER MUNICIPAL       |        260        2.60       76.60
POINT HOPE (AWOS)      |        260        2.60       79.20
SAINT MARY`S (AWOS)    |        260        2.60       81.80
SEWARD                 |        260        2.60       84.40
SHISHMAREF (AWOS)      |        260        2.60       87.00
TALKEETNA STATE ARPT   |        260        2.60       89.60
TANANA RALPH M CALHOUN |        260        2.60       92.20
UNALAKLEET FIELD       |        260        2.60       94.80
VALDEZ PIONEER FIEL    |        260        2.60       97.40
WHITTIER               |        260        2.60      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016