Frequencies for first 10,000 rows of designtype variable in plan2017 dataset :

    DesignType |      Freq.     Percent        Cum.
---------------+-----------------------------------
      Design 1 |        513        5.13        5.13
      Design 2 |         58        0.58        5.71
      Design 3 |         38        0.38        6.09
      Design 4 |         30        0.30        6.39
      Design 5 |         15        0.15        6.54
Not Applicable |      9,346       93.46      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 Dec 2017