Figure 2: Distribution by Classification Categories

              19xx   Bly    1950   1960   1970   1980   1990   Totals
Total Docs.     10     10     10     22     66    132     99      349
Src. Internal    8      9      8     20     55    108     93      301
Aud. Internal    8      9      6     20     53    109     88      293
Aud. Named       0      7      3     13     27     62     33      145
Public Health    9     10     10     22     61    126     96      334
Form             2      0      0      2      8     18     19       49
Image            0      0      2      1      1      0      0        4
English         10      9     10     22     63    130     99      343
Editing          3      1      0      2      3      3      5       17
Marginalia       4      9      5     12     34     73     39      176
Short            3      2      2      4     20     37     33      101