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

    Average |
  Total Sky |
      Cover |
   (tenths) |      Freq.     Percent        Cum.
------------+-----------------------------------
         .5 |          1        0.01        0.01
         .7 |          1        0.01        0.02
         .8 |          1        0.01        0.03
          1 |          2        0.02        0.05
        1.1 |          2        0.02        0.07
        1.2 |          1        0.01        0.08
        1.3 |          3        0.03        0.11
        1.4 |          2        0.02        0.13
        1.5 |          3        0.03        0.16
        1.6 |          1        0.01        0.17
        1.7 |          3        0.03        0.20
        1.8 |          1        0.01        0.21
        1.9 |          8        0.08        0.29
          2 |          5        0.05        0.34
        2.1 |          7        0.07        0.41
        2.2 |         10        0.10        0.51
        2.3 |          9        0.09        0.60
        2.4 |         12        0.12        0.72
        2.5 |         10        0.10        0.82
        2.6 |         12        0.12        0.94
        2.7 |         15        0.15        1.09
        2.8 |         17        0.17        1.26
        2.9 |         11        0.11        1.37
          3 |         26        0.26        1.63
        3.1 |         19        0.19        1.82
        3.2 |         27        0.27        2.09
        3.3 |         23        0.23        2.32
        3.4 |         41        0.41        2.73
        3.5 |         32        0.32        3.05
        3.6 |         34        0.34        3.39
        3.7 |         50        0.50        3.89
        3.8 |         53        0.53        4.42
        3.9 |         47        0.47        4.89
          4 |         59        0.59        5.48
        4.1 |         49        0.49        5.97
        4.2 |         76        0.76        6.73
        4.3 |         79        0.79        7.52
        4.4 |         73        0.73        8.25
        4.5 |         76        0.76        9.01
        4.6 |         91        0.91        9.92
        4.7 |         86        0.86       10.78
        4.8 |         94        0.94       11.72
        4.9 |         87        0.87       12.59
          5 |        112        1.12       13.71
        5.1 |        129        1.29       15.00
        5.2 |        141        1.41       16.41
        5.3 |        156        1.56       17.97
        5.4 |        161        1.61       19.58
        5.5 |        155        1.55       21.13
        5.6 |        173        1.73       22.86
        5.7 |        175        1.75       24.61
        5.8 |        185        1.85       26.46
        5.9 |        182        1.82       28.28
          6 |        214        2.14       30.42
        6.1 |        197        1.97       32.39
        6.2 |        223        2.23       34.62
        6.3 |        233        2.33       36.95
        6.4 |        256        2.56       39.51
        6.5 |        264        2.64       42.15
        6.6 |        270        2.70       44.85
        6.7 |        256        2.56       47.41
        6.8 |        251        2.51       49.92
        6.9 |        270        2.70       52.62
          7 |        299        2.99       55.61
        7.1 |        256        2.56       58.17
        7.2 |        279        2.79       60.96
        7.3 |        302        3.02       63.98
        7.4 |        293        2.93       66.91
        7.5 |        288        2.88       69.79
        7.6 |        306        3.06       72.85
        7.7 |        285        2.85       75.70
        7.8 |        229        2.29       77.99
        7.9 |        232        2.32       80.31
          8 |        243        2.43       82.74
        8.1 |        223        2.23       84.97
        8.2 |        229        2.29       87.26
        8.3 |        215        2.15       89.41
        8.4 |        192        1.92       91.33
        8.5 |        170        1.70       93.03
        8.6 |        138        1.38       94.41
        8.7 |        104        1.04       95.45
        8.8 |        101        1.01       96.46
        8.9 |         75        0.75       97.21
          9 |         77        0.77       97.98
        9.1 |         45        0.45       98.43
        9.2 |         43        0.43       98.86
        9.3 |         35        0.35       99.21
        9.4 |         30        0.30       99.51
        9.5 |         21        0.21       99.72
        9.6 |         13        0.13       99.85
        9.7 |          9        0.09       99.94
        9.8 |          4        0.04       99.98
        9.9 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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